C1111233131211111211113313331333133313232321333133313231323311221311   >>    C111123313121111121111331333133313331323232133313331323132331122131   <<    C1111233131211111211113313331333133313232321333133313231323311221313   >>      C1111233131211111211113313331333133313232321333133313231323311221312   >>