1
1
2
2
1
1
1
2
2
1
1
2
1
2
2
1
1
1
2
1
1
3
1
1
3
1
3
2
1
1
3
2
5
3
2
2
1
2
1
1
1
2
4
1
3
3
2
1
4
1
2
1
5
3
Snowdrift