group	trees
1	27
1	22
1	29
1	21
1	19
1	33
1	16
1	20
1	24
1	27
1	28
1	19
2	12
2	12
2	15
2	9
2	20
2	18
2	17
2	14
2	14
2	2
2	17
2	19
3	18
3	4
3	22
3	15
3	18
3	19
3	22
3	12
3	12