a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
a=wye,b=pan,i=5,x=0.5732889198020006,y=0.8636244699032729
a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
