C12313211232233312111111312111133133313331333132232233122322222311   >>    C1231321123223331211111131211113313331333133313223223312232222231   <<    C12313211232233312111111312111133133313331333132232233122322222313   >>      C12313211232233312111111312111133133313331333132232233122322222312   >>