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=wye,i=8,x=0.59855401,y=0.97618139
a=pan,b=wye,i=10,x=0.50262601,y=0.95261836
