C12313211232233312111111312111133133313331323133313333232233122232233131   >>    C1231321123223331211111131211113313331333132313331333323223312223223313   <<    C12313211232233312111111312111133133313331323133313333232233122232233133   >>      C12313211232233312111111312111133133313331323133313333232233122232233132   >>