a   b   i  x          y          i_2_1
eks pan 2  0.75867996 0.52215111 3.00000000
eks wye 4  0.38139939 0.13418874 4.33333333
eks zee 7  0.61178406 0.18788492 4.33333333
hat wye 9  0.03144188 0.74955076 9.00000000
pan pan 1  0.34679014 0.72680286 5.50000000
pan wye 10 0.50262601 0.95261836 5.50000000
wye wye 3  0.20460331 0.33831853 4.00000000
wye pan 5  0.57328892 0.86362447 4.00000000
zee pan 6  0.52712616 0.49322129 7.00000000
zee wye 8  0.59855401 0.97618139 7.00000000
