i	z	y
1	12.1	12.7
1	10.2	10.3
1	13.6	19.8
1	14.8	17.4
1	16.1	18.9
1	14.3	16.1
1	12.0	12.7
2	11.3	41.4
2	12.4	43.3
2	13.6	49.7
2	14.1	51.6
2	15.0	51.5
2	14.9	50.5
2	10.9	38.4