i	j	y
1	1	21.3
1	2	15.9
1	3	17.3
1	4	14.4
1	5	22.4
1	6	16.8
1	7	13.7
1	8	20.4
2	1	20.2
2	2	16.3
2	3	17.6
2	4	13.3
2	5	21.6
2	6	17.4
2	7	12.9
2	8	19.8
3	1	21.5
3	2	15.6
3	3	17.1
3	4	13.9
3	5	23.1
3	6	18.2
3	7	13.0
3	8	20.1