C12313211232233312111111312111133133313331333132232233122322131113122311   >>    C1231321123223331211111131211113313331333133313223223312232213111312231   <<    C12313211232233312111111312111133133313331333132232233122322131113122313   >>      C12313211232233312111111312111133133313331333132232233122322131113122312   >>