C11111333133313232233133313331333133313331312111113231333121211   >>    C1111133313331323223313331333133313331333131211111323133312121   <<    C11111333133313232233133313331333133313331312111113231333121213   >>      C11111333133313232233133313331333133313331312111113231333121212   >>