C12313211232233312111111312111133133313331333132232233122322131113123231   >>    C1231321123223331211111131211113313331333133313223223312232213111312323   <<    C12313211232233312111111312111133133313331333132232233122322131113123233   >>      C12313211232233312111111312111133133313331333132232233122322131113123232   >>