ldbcak
mdbc
ndbca
odbcak
pdbc
a4bc
b4bca
c4bcak
d4bc
e4bca
zucca
0uccak
1ucc
2ucca
3uccak
oldcak
pldc
qldca
rldcak
sldc
dcec
ececa
fcecak
gcec
hceca