C11111333133313232233133313331333132313331323321313331333131211111231231211   >>    C1111133313331323223313331333133313231333132332131333133313121111123123121   <<    C11111333133313232233133313331333132313331323321313331333131211111231231213   >>      C11111333133313232233133313331333132313331323321313331333131211111231231212   >>