i	y
1	32.94
1	35.98
1	34.76
1	32.40
2	30.55
2	32.64
2	32.37
2	32.04
3	31.23
3	31.09
3	30.62
3	30.42
4	34.41
4	34.88
4	34.07
4	33.87
5	35.61
5	35.00
5	33.65
5	32.91