r2op21
q2op2
p2op
o2op21
n2op2
2bop2
1bop
0bop21
zbop2
ybop
dlnp
clnp21
blnp2
alnp
9knp21
oump21
nump2
mump
lump21
kump2
z3lp2
y3lp
x3lp21
w3lp2
v3lp