C11111333133313232233133313331333132313331323321313331333121111332211111   >>    C1111133313331323223313331333133313231333132332131333133312111133221111   <<    C11111333133313232233133313331333132313331323321313331333121111332211113   >>      C11111333133313232233133313331333132313331323321313331333121111332211112   >>