C11111333133313232233133313331333133313231312111133223313112211231211   >>    C1111133313331323223313331333133313331323131211113322331311221123121   <<    C11111333133313232233133313331333133313231312111133223313112211231213   >>      C11111333133313232233133313331333133313231312111133223313112211231212   >>