C11111333133313232233133313331333133313331312111133133313231333133313231232311   >>    C1111133313331323223313331333133313331333131211113313331323133313331323123231   <<    C11111333133313232233133313331333133313331312111133133313231333133313231232313   >>      C11111333133313232233133313331333133313331312111133133313231333133313231232312   >>