a   b   i x                   y
new pan 1 0.3467901443380824  0.7268028627434533
new pan 2 0.7586799647899636  0.5221511083334797
new wye 3 0.20460330576630303 0.33831852551664776
new wye 4 0.38139939387114097 0.13418874328430463
new pan 5 0.5732889198020006  0.8636244699032729
new pan 6 0.5271261600918548  0.49322128674835697
new zee 7 0.6117840605678454  0.1878849191181694
