C11111333133313232233133313331333132313331323321313331333121221   >>    C1111133313331323223313331333133313231333132332131333133312122   <<    C11111333133313232233133313331333132313331323321313331333121223   >>      C11111333133313232233133313331333132313331323321313331333121222   >>