Mường Lay weather in February

In February, Mường Lay sees average daytime highs of 23°C and overnight lows near 12°C, with 54 mm of rain across 8.3 wet days and about 11.2 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 24°C by the end. The sky is clear or mostly clear about 40% of the time in February, and the air most often feels comfortable.

Daylight stretches from about 11 hours at the start of February to 11 h 30 min by month's end. Set against the rest of the year, February is Mường Lay's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Mường Lay's year-round climate.

Daytime high: 23°; 10th warmest
Overnight low: 12°; 2nd coldest
Rainfall: 54 mm; 8.3 wet days
Daylight: 11 h 12 min; 6:45 AM – 5:59 PM
Cloud cover: 51%; 2nd clearest
Wind: 3 km/h; 2nd windiest
Solar energy: 3.97 kWh/m²
Travel score: 7.1; out of 10

Mường Lay is old town of Dien Bien province, Vietnam.

Density: 179/km²; people per km²
Founded: 1971

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← January Mường Lay year-round climate March →Best places to visit in February

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in February

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 22°C in the first days to 24°C by the end.

A typical February day in Mường Lay reaches about 23°C in the afternoon and slips back to 12°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 29°C. Set against its neighbours, February runs about 2°C warmer than January and about 3°C cooler than March.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Avg high (°C)	21	21	22	22	22	22	22	22	22	23	23	23	23	23	23	23	23	24	24	24	24	24	24	24	24	25	25	25
Avg low (°C)	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	13	13	13	13	13	13	13	13	13	13	13

	Avg high (°C)	Avg low (°C)
1	21	12
2	21	12
3	22	12
4	22	12
5	22	12
6	22	12
7	22	12
8	22	12
9	22	12
10	23	12
11	23	12
12	23	12
13	23	12
14	23	12
15	23	12
16	23	12
17	23	12
18	24	13
19	24	13
20	24	13
21	24	13
22	24	13
23	24	13
24	24	13
25	24	13
26	25	13
27	25	13
28	25	13

How February really feels in Mường Lay

Once humidity and wind are folded in, February averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

February sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Mường Lay weather by month

How February compares with the rest of the year at a glance. February is the 10th-warmest and 11th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	21° / 12°	59	8	10.8	6.8
Feb	23° / 12°	54	8.3	11.2	7.1
Mar	26° / 15°	123	13.1	11.8	6.3
Apr	28° / 19°	219	19.5	12.5	4.7
May	29° / 21°	328	25.2	13	3.5
Jun	29° / 23°	455	28.3	13.3	2.9
Jul	29° / 23°	453	29.4	13.2	3.0
Aug	29° / 23°	364	26.9	12.8	3.2
Sep	29° / 22°	187	19.7	12.1	4.2
Oct	27° / 20°	86	13.7	11.5	5.9
Nov	24° / 16°	55	8	10.9	7.2
Dec	21° / 13°	47	6.2	10.7	7.1

Cloud cover in February

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in February.

Beyond those clear spells, partly cloudy skies cover about 19% of February, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Clearer (%)	49	50	52	53	53	54	56	56	57	58	58	59	59	60	60	60	61	61	62	62	62	63	63	63	64	64	65	65
Cloudier (%)	51	50	48	47	47	46	44	44	43	42	42	41	41	40	40	40	39	39	38	38	38	37	37	37	36	36	35	35

	Clearer (%)	Cloudier (%)
1	49	51
2	50	50
3	52	48
4	53	47
5	53	47
6	54	46
7	56	44
8	56	44
9	57	43
10	58	42
11	58	42
12	59	41
13	59	41
14	60	40
15	60	40
16	60	40
17	61	39
18	61	39
19	62	38
20	62	38
21	62	38
22	63	37
23	63	37
24	63	37
25	64	36
26	64	36
27	65	35
28	65	35

Chance of precipitation in February

Any precipitation

Mường Lay gets around 54 mm of rain over 8.3 wet days in February. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% and peaks near 31% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Rain chance (%)	30	30	30	29	29	29	29	29	29	29	29	29	29	30	30	30	31	31	31	31	31	31	31	31	30	30	30	30

	Rain chance (%)
1	30
2	30
3	30
4	29
5	29
6	29
7	29
8	29
9	29
10	29
11	29
12	29
13	29
14	30
15	30
16	30
17	31
18	31
19	31
20	31
21	31
22	31
23	31
24	31
25	30
26	30
27	30
28	30

Humidity in February

DryComfortableHumidMuggyOppressiveMiserable

Most of February feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, February lands in the comfortable band about 45% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Dry (%)	50	49	48	47	47	46	44	43	42	41	40	39	38	37	35	34	33	32	31	31	30	29	29	28	27	27	26	25
Comfortable (%)	46	46	47	47	48	48	48	48	48	48	47	47	46	46	45	45	44	43	43	42	42	41	41	40	40	40	40	40
Humid (%)	4	4	5	5	6	6	7	8	9	10	12	13	15	16	18	20	21	23	24	26	27	28	29	30	31	32	33	34
Muggy (%)	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	2	2	2	2	2	2	2	1	1	1	1	1

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	50	46	4	0
2	49	46	4	0
3	48	47	5	0
4	47	47	5	0
5	47	48	6	0
6	46	48	6	0
7	44	48	7	0
8	43	48	8	0
9	42	48	9	1
10	41	48	10	1
11	40	47	12	1
12	39	47	13	1
13	38	46	15	1
14	37	46	16	1
15	35	45	18	1
16	34	45	20	1
17	33	44	21	2
18	32	43	23	2
19	31	43	24	2
20	31	42	26	2
21	30	42	27	2
22	29	41	28	2
23	29	41	29	2
24	28	40	30	1
25	27	40	31	1
26	27	40	32	1
27	26	40	33	1
28	25	40	34	1

Wind in February

Winds average 3 km/h in February.

Across February, daily wind ranges from about 3 km/h on the calmest days to 3 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Wind speed (km/h)	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3	3
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	3	calm
2	3	calm
3	3	calm
4	3	calm
5	3	calm
6	3	calm
7	3	calm
8	3	calm
9	3	calm
10	3	calm
11	3	calm
12	3	calm
13	3	calm
14	3	calm
15	3	calm
16	3	calm
17	3	calm
18	3	calm
19	3	calm
20	3	calm
21	3	calm
22	3	calm
23	3	calm
24	3	calm
25	3	calm
26	3	calm
27	3	calm
28	3	calm

Sunrise & sunset in February

DaylightNight

Daylight runs from about 11 hours at the start of February to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over February. Sunrise moves from 6:51 AM to 6:36 AM, and sunset from 5:51 PM to 6:06 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Daylight (h)	11.0	11.0	11.0	11.1	11.1	11.1	11.1	11.1	11.1	11.2	11.2	11.2	11.2	11.2	11.2	11.3	11.3	11.3	11.3	11.3	11.4	11.4	11.4	11.4	11.4	11.5	11.5	11.5
Sunrise (AM)	6:51	6:51	6:50	6:50	6:49	6:49	6:49	6:48	6:48	6:47	6:47	6:46	6:46	6:45	6:45	6:44	6:43	6:43	6:42	6:42	6:41	6:40	6:40	6:39	6:38	6:37	6:37	6:36
Sunset (PM)	5:51	5:52	5:52	5:53	5:54	5:54	5:55	5:55	5:56	5:57	5:57	5:58	5:58	5:59	5:59	6:00	6:01	6:01	6:02	6:02	6:03	6:03	6:04	6:04	6:05	6:05	6:06	6:06

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.0	6:51	5:51
2	11.0	6:51	5:52
3	11.0	6:50	5:52
4	11.1	6:50	5:53
5	11.1	6:49	5:54
6	11.1	6:49	5:54
7	11.1	6:49	5:55
8	11.1	6:48	5:55
9	11.1	6:48	5:56
10	11.2	6:47	5:57
11	11.2	6:47	5:57
12	11.2	6:46	5:58
13	11.2	6:46	5:58
14	11.2	6:45	5:59
15	11.2	6:45	5:59
16	11.3	6:44	6:00
17	11.3	6:43	6:01
18	11.3	6:43	6:01
19	11.3	6:42	6:02
20	11.3	6:42	6:02
21	11.4	6:41	6:03
22	11.4	6:40	6:03
23	11.4	6:40	6:04
24	11.4	6:39	6:04
25	11.4	6:38	6:05
26	11.5	6:37	6:05
27	11.5	6:37	6:06
28	11.5	6:36	6:06

Solar energy in February

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in February, about 3.97 kWh/m².

For context, solar energy here swings from a low near 3.09 kWh/m² to a high of 5.2 kWh/m² in April across the year — February's 3.97 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28
Solar energy (kWh/m²)	3.4	3.5	3.5	3.5	3.6	3.6	3.7	3.7	3.8	3.8	3.9	3.9	3.9	4.0	4.0	4.0	4.1	4.1	4.2	4.2	4.2	4.3	4.3	4.3	4.4	4.4	4.5	4.5
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.4	Moderate
2	3.5	Moderate
3	3.5	Moderate
4	3.5	Moderate
5	3.6	Moderate
6	3.6	Moderate
7	3.7	Moderate
8	3.7	Moderate
9	3.8	Moderate
10	3.8	Moderate
11	3.9	Moderate
12	3.9	Moderate
13	3.9	Moderate
14	4.0	Moderate
15	4.0	Bright
16	4.0	Bright
17	4.1	Bright
18	4.1	Bright
19	4.2	Bright
20	4.2	Bright
21	4.2	Bright
22	4.3	Bright
23	4.3	Bright
24	4.3	Bright
25	4.4	Bright
26	4.4	Bright
27	4.5	Bright
28	4.5	Bright

Planning a trip in February

Hazard calendar for Mường Lay

In seasonPeak

None of Mường Lay's seasonal hazards are active in February. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Mường Lay's monsoon runs April–August, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is February a good time to visit Mường Lay?

Our two travel scores rate February for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.1

Sightseeing

2nd-best month of the year

5.5

Beach & pool

4th-best month of the year

February is one of the better times to visit Mường Lay for general sightseeing.

What to pack for Mường Lay in February

From February's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In February, Mường Lay sees daytime highs around 23°C and nights near 12°C. Worth packing: light clothes and rain gear. About 8 days see rain.

light clothesrain gear

UV index in Mường Lay in February

LowModerateHighVery highExtreme

Clear-sky midday UV in February peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mường Lay peaks around June 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 6 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	7	9	11	9	11	14	13	12	10	9	8	6
Level	High	Very high	Extreme	Very high	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	High

	UV index (midday)	Level
Jan	7	High
Feb	9	Very high
Mar	11	Extreme
Apr	9	Very high
May	11	Extreme
Jun	14	Extreme
Jul	13	Extreme
Aug	12	Extreme
Sep	10	Very high
Oct	9	Very high
Nov	8	Very high
Dec	6	High

Air quality in Mường Lay in February

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where February falls, not just the annual average.

Air quality in Mường Lay is worst in April — around 99 µg/m³ PM2.5 (unhealthy), about 8.1× the cleanest month (July, 12 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	31	41	73	99	32	14	12	13	17	23	26	30
Level	Moderate	Poor	Unhealthy	Unhealthy	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	31	Moderate
Feb	41	Poor
Mar	73	Unhealthy
Apr	99	Unhealthy
May	32	Moderate
Jun	14	Moderate
Jul	12	Moderate
Aug	13	Moderate
Sep	17	Moderate
Oct	23	Moderate
Nov	26	Moderate
Dec	30	Moderate

Location & terrain

Where is Mường Lay?

Mường Lay sits at 22.0°N, 103.1°E, 496 m above sea level, in Vietnam. The nearest listed city is Lai Châu, 55 km away.

Topography around Mường Lay

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Mường Lay.

Within 3 km, the terrain around Mường Lay has large variations in elevation — a maximum elevation change of 987 m around an average of 501 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,867 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,950 m.

The land around Mường Lay is covered by trees (78%) within 3 km, trees (80%) within 16 km, and trees (80%) within 80 km.

3 km

987 m

trees 78%

16 km

1,867 m

trees 80%

80 km

2,950 m

trees 80%

treesgrasslandcroplandartificial surfaceswater

← January Mường Lay year-round climate March →Best places to visit in February

February weather nearby: Lai Châu 55 km · Dien Bien Phu 69 km · Sapa 82 km · Thị Trấn Thuận Châu 85 km · Lào Cai 102 km · Ít Ong 107 km · Sơn La 111 km · Thị Trấn Phố Lu 114 km

Vietnam travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type A / B / C / F; 220 V · 50 Hz
Prices: ≈ 29% of US; price level, 2025
GDP per capita: $5,066; 2025
Happiness: 6.4 / 10; World Happiness, 2025
Safe drinking water: 59%; of population, 2024
Homicide rate: 1.5; per 100k, 2011
Road deaths: 30.6; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Moderate; EF EPI 500
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Mường Lay (22°, 103.1333°, elevation 496 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	21	12
2	21	12
3	22	12
4	22	12
5	22	12
6	22	12
7	22	12
8	22	12
9	22	12
10	23	12
11	23	12
12	23	12
13	23	12
14	23	12
15	23	12
16	23	12
17	23	12
18	24	13
19	24	13
20	24	13
21	24	13
22	24	13
23	24	13
24	24	13
25	24	13
26	25	13
27	25	13
28	25	13

	Clearer (%)	Cloudier (%)
1	49	51
2	50	50
3	52	48
4	53	47
5	53	47
6	54	46
7	56	44
8	56	44
9	57	43
10	58	42
11	58	42
12	59	41
13	59	41
14	60	40
15	60	40
16	60	40
17	61	39
18	61	39
19	62	38
20	62	38
21	62	38
22	63	37
23	63	37
24	63	37
25	64	36
26	64	36
27	65	35
28	65	35

	Rain chance (%)
1	30
2	30
3	30
4	29
5	29
6	29
7	29
8	29
9	29
10	29
11	29
12	29
13	29
14	30
15	30
16	30
17	31
18	31
19	31
20	31
21	31
22	31
23	31
24	31
25	30
26	30
27	30
28	30

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	50	46	4	0
2	49	46	4	0
3	48	47	5	0
4	47	47	5	0
5	47	48	6	0
6	46	48	6	0
7	44	48	7	0
8	43	48	8	0
9	42	48	9	1
10	41	48	10	1
11	40	47	12	1
12	39	47	13	1
13	38	46	15	1
14	37	46	16	1
15	35	45	18	1
16	34	45	20	1
17	33	44	21	2
18	32	43	23	2
19	31	43	24	2
20	31	42	26	2
21	30	42	27	2
22	29	41	28	2
23	29	41	29	2
24	28	40	30	1
25	27	40	31	1
26	27	40	32	1
27	26	40	33	1
28	25	40	34	1

	Avg high (°C)	Avg low (°C)
1	21	12
2	21	12
3	22	12
4	22	12
5	22	12
6	22	12
7	22	12
8	22	12
9	22	12
10	23	12
11	23	12
12	23	12
13	23	12
14	23	12
15	23	12
16	23	12
17	23	12
18	24	13
19	24	13
20	24	13
21	24	13
22	24	13
23	24	13
24	24	13
25	24	13
26	25	13
27	25	13
28	25	13

	Clearer (%)	Cloudier (%)
1	49	51
2	50	50
3	52	48
4	53	47
5	53	47
6	54	46
7	56	44
8	56	44
9	57	43
10	58	42
11	58	42
12	59	41
13	59	41
14	60	40
15	60	40
16	60	40
17	61	39
18	61	39
19	62	38
20	62	38
21	62	38
22	63	37
23	63	37
24	63	37
25	64	36
26	64	36
27	65	35
28	65	35

	Rain chance (%)
1	30
2	30
3	30
4	29
5	29
6	29
7	29
8	29
9	29
10	29
11	29
12	29
13	29
14	30
15	30
16	30
17	31
18	31
19	31
20	31
21	31
22	31
23	31
24	31
25	30
26	30
27	30
28	30

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	50	46	4	0
2	49	46	4	0
3	48	47	5	0
4	47	47	5	0
5	47	48	6	0
6	46	48	6	0
7	44	48	7	0
8	43	48	8	0
9	42	48	9	1
10	41	48	10	1
11	40	47	12	1
12	39	47	13	1
13	38	46	15	1
14	37	46	16	1
15	35	45	18	1
16	34	45	20	1
17	33	44	21	2
18	32	43	23	2
19	31	43	24	2
20	31	42	26	2
21	30	42	27	2
22	29	41	28	2
23	29	41	29	2
24	28	40	30	1
25	27	40	31	1
26	27	40	32	1
27	26	40	33	1
28	25	40	34	1

	Avg high (°C)	Avg low (°C)
1	21	12
2	21	12
3	22	12
4	22	12
5	22	12
6	22	12
7	22	12
8	22	12
9	22	12
10	23	12
11	23	12
12	23	12
13	23	12
14	23	12
15	23	12
16	23	12
17	23	12
18	24	13
19	24	13
20	24	13
21	24	13
22	24	13
23	24	13
24	24	13
25	24	13
26	25	13
27	25	13
28	25	13

	Clearer (%)	Cloudier (%)
1	49	51
2	50	50
3	52	48
4	53	47
5	53	47
6	54	46
7	56	44
8	56	44
9	57	43
10	58	42
11	58	42
12	59	41
13	59	41
14	60	40
15	60	40
16	60	40
17	61	39
18	61	39
19	62	38
20	62	38
21	62	38
22	63	37
23	63	37
24	63	37
25	64	36
26	64	36
27	65	35
28	65	35

	Rain chance (%)
1	30
2	30
3	30
4	29
5	29
6	29
7	29
8	29
9	29
10	29
11	29
12	29
13	29
14	30
15	30
16	30
17	31
18	31
19	31
20	31
21	31
22	31
23	31
24	31
25	30
26	30
27	30
28	30

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	50	46	4	0
2	49	46	4	0
3	48	47	5	0
4	47	47	5	0
5	47	48	6	0
6	46	48	6	0
7	44	48	7	0
8	43	48	8	0
9	42	48	9	1
10	41	48	10	1
11	40	47	12	1
12	39	47	13	1
13	38	46	15	1
14	37	46	16	1
15	35	45	18	1
16	34	45	20	1
17	33	44	21	2
18	32	43	23	2
19	31	43	24	2
20	31	42	26	2
21	30	42	27	2
22	29	41	28	2
23	29	41	29	2
24	28	40	30	1
25	27	40	31	1
26	27	40	32	1
27	26	40	33	1
28	25	40	34	1