a   b   i  x                   y
pan pan 1  0.3467901443380824  0.7268028627434533
eks pan 2  0.7586799647899636  0.5221511083334797
wye wye 3  0.20460330576630303 0.33831852551664776
eks wye 4  0.38139939387114097 0.13418874328430463
wye pan 5  0.5732889198020006  0.8636244699032729
zee pan 6  0.5271261600918548  0.49322128674835697
eks zee 7  0.6117840605678454  0.1878849191181694
zee wye 8  0.5985540091064224  0.976181385699006
hat wye 9  0.03144187646093577 0.7495507603507059
pan wye 10 0.5026260055412137  0.9526183602969864