C12313211232233312111111312111133133313331333132232233122223213131   >>    C1231321123223331211111131211113313331333133313223223312222321313   <<    C12313211232233312111111312111133133313331333132232233122223213133   >>      C12313211232233312111111312111133133313331333132232233122223213132   >>