C12313211232233312111111312111133133313331323133313332221331213132132111   >>    C1231321123223331211111131211113313331333132313331333222133121313213211   <<    C12313211232233312111111312111133133313331323133313332221331213132132113   >>      C12313211232233312111111312111133133313331323133313332221331213132132112   >>