C1111233131211111211113313331333133313232321333133313331333231323222223111   >>    C111123313121111121111331333133313331323232133313331333133323132322222311   <<    C1111233131211111211113313331333133313232321333133313331333231323222223113   >>      C1111233131211111211113313331333133313232321333133313331333231323222223112   >>