n4x21
m4x2
l4x21c
k4x21
j4x2
ydx2
xdx21c
wdx21
vdx2
udx21c
9mw21c
8mw21
7mw2
6mw21c
5mw21
kwv21
jwv2
iwv21c
hwv21
gwv2
v5u2
u5u21c
t5u21
s5u2
r5u21c