C12313211232233312111111312111133133313331323221312132212223231   >>    C1231321123223331211111131211113313331333132322131213221222323   <<    C12313211232233312111111312111133133313331323221312132212223233   >>      C12313211232233312111111312111133133313331323221312132212223232   >>