C12313211232233312111111312111133133313331333132232233122233123311   >>    C1231321123223331211111131211113313331333133313223223312223312331   <<    C12313211232233312111111312111133133313331333132232233122233123313   >>      C12313211232233312111111312111133133313331333132232233122233123312   >>