a   b   i x                   y                   z
pan pan 1 0.3467901443380824  0.7268028627434533  -1
eks pan 2 0.7586799647899636  0.5221511083334797  -2
wye wye 3 0.20460330576630303 0.33831852551664776 -3
eks wye 4 0.38139939387114097 0.13418874328430463 -4
