3x1irr
4x1i
5x1ir
6x1irr
7x1i
so2i
to2ir
uo2irr
vo2i
wo2ir
hf3ir
if3irr
jf3i
kf3ir
lf3irr
653irr
753i
853ir
953irr
a63i
vw4i
ww4ir
xw4irr
yw4i
zw4ir