a=wye,b=wye,i=3,x=0.20460331,y=0.33831853
a=eks,b=wye,i=4,x=0.38139939,y=0.13418874
a=wye,b=pan,i=5,x=0.57328892,y=0.86362447
a=zee,b=pan,i=6,x=0.52712616,y=0.49322129
