C12313211232233312111111312111133133313331323221312132232332221   >>    C1231321123223331211111131211113313331333132322131213223233222   <<    C12313211232233312111111312111133133313331323221312132232332223   >>      C12313211232233312111111312111133133313331323221312132232332222   >>