4z1r
3z1r2s
2z1r2
1z1r
0z1r2s
f90r2s
e90r2
d90r
c90r2s
b90r2
qi0r2
pi0r
oi0r2s
ni0r2
mi0r
1rzr
0rzr2s
zrzr2
yrzr
xrzr2s
c1yr2s
b1yr2
a1yr
90yr2s
80yr2