C12313211232233312111111312111133133313331333132232233122313133311321   >>    C1231321123223331211111131211113313331333133313223223312231313331132   <<    C12313211232233312111111312111133133313331333132232233122313133311323   >>      C12313211232233312111111312111133133313331333132232233122313133311322   >>