a   b   i x                   y
pan pan 1 0.3467901443380824  1.3467901443380823
eks pan 2 0.7586799647899636  2.7586799647899634
wye wye 3 0.20460330576630303 3.204603305766303
eks wye 4 0.38139939387114097 4.381399393871141
wye pan 5 0.5732889198020006  5.573288919802001
zee pan 6 0.5271261600918548  6.527126160091854
eks zee 7 0.6117840605678454  7.611784060567845
