C12313211232233312111111312111133133313331323133313333232233213133322331   >>    C1231321123223331211111131211113313331333132313331333323223321313332233   <<    C12313211232233312111111312111133133313331323133313333232233213133322333   >>      C12313211232233312111111312111133133313331323133313333232233213133322332   >>