C12313211232233312111111312111133133313331323221312132211211211   >>    C1231321123223331211111131211113313331333132322131213221121121   <<    C12313211232233312111111312111133133313331323221312132211211213   >>      C12313211232233312111111312111133133313331323221312132211211212   >>