t0doc
s0do
r0docb
q0doc
p0do
49co
39cocb
29coc
19co
09cocb
fjcocb
ejcoc
djco
cjcocb
bjcoc
qsboc
psbo
osbocb
nsboc
msbo
11ao
01aocb
z1aoc
y1ao
x1aocb