i	j	k	y
1	1	1	20.6
1	1	2	22.3
1	1	3	19.8
1	2	1	23.4
1	2	2	21.9
1	2	3	22.8
1	3	1	21.8
1	3	2	20.6
1	3	3	21.3
2	1	1	13.6
2	1	2	13.9
2	1	3	14.2
2	2	1	13.7
2	2	2	14.5
2	2	3	13.8
2	3	1	12.9
2	3	2	13.1
2	3	3	13.4
3	1	1	14.8
3	1	2	14.6
3	1	3	14.9
3	2	1	14.3
3	2	2	13.9
3	2	3	13.5
3	3	1	14.4
3	3	2	13.8
3	3	3	14.1
4	1	1	14.1
4	1	2	13.8
4	1	3	14.3
4	2	1	14.0
4	2	2	13.9
4	2	3	14.2
4	3	1	14.1
4	3	2	14.1
4	3	3	13.6