C12313211232233312111111312111133133313331333132232233122322131111133211   >>    C1231321123223331211111131211113313331333133313223223312232213111113321   <<    C12313211232233312111111312111133133313331333132232233122322131111133213   >>      C12313211232233312111111312111133133313331333132232233122322131111133212   >>