C12313211232233312111111312111133133313331323233121221322121111   >>    C1231321123223331211111131211113313331333132323312122132212111   <<    C12313211232233312111111312111133133313331323233121221322121113   >>      C12313211232233312111111312111133133313331323233121221322121112   >>