x                   z   a   b
0.3467901443380824  N/A pan pan
0.7586799647899636  N/A eks pan
0.20460330576630303 N/A N/A wye
0.38139939387114097 N/A eks N/A
N/A                 N/A wye pan
0.5271261600918548  N/A zee pan
0.6117840605678454  N/A eks zee
0.5985540091064224  N/A zee wye
0.03144187646093577 N/A N/A N/A
0.5026260055412137  N/A pan wye
