a   b   i x                   y
pan pan 1 0.3467901443380824  5
eks pan 2 0.7586799647899636  7
wye wye 3 0.20460330576630303 9
eks wye 4 0.38139939387114097 11
wye pan 5 0.5732889198020006  9
zee pan 6 0.5271261600918548  11
eks zee 7 0.6117840605678454  13
