9001x7
a101
b101x
c101x7
d101
yr11
zr11x
0r11x7
1r11
2r11x
ni21x
oi21x7
pi21
qi21x
ri21x7
c921x7
d921
e921x
f921x7
g921
1z31
2z31x
3z31x7
4z31
5z31x