a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
a=zee,b=wye,i=8,x=0.5985540091064224,yyy=0.976181385699006
a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
