a   b   i x                   y                   sa  sb  si sx                  sy                  snonesuch
pan pan 1 0.3467901443380824  0.7268028627434533  pan pan 1  0.3467901443380824  0.7268028627434533  (absent)
eks pan 2 0.7586799647899636  0.5221511083334797  eks pan 2  0.7586799647899636  0.5221511083334797  (absent)
wye wye 3 0.20460330576630303 0.33831852551664776 wye wye 3  0.20460330576630303 0.33831852551664776 (absent)
eks wye 4 0.38139939387114097 0.13418874328430463 eks wye 4  0.38139939387114097 0.13418874328430463 (absent)
