C11111333133313232233133313331333133313331311331333133313231333132313212121   >>    C1111133313331323223313331333133313331333131133133313331323133313231321212   <<    C11111333133313232233133313331333133313331311331333133313231333132313212123   >>      C11111333133313232233133313331333133313331311331333133313231333132313212122   >>