C11111333133313232233133313331333133313211231133132313231323132313112211231211   >>    C1111133313331323223313331333133313331321123113313231323132313231311221123121   <<    C11111333133313232233133313331333133313211231133132313231323132313112211231213   >>      C11111333133313232233133313331333133313211231133132313231323132313112211231212   >>