C312312111111331312111133133313331333133313231323133313331333133313223312311   >>    C31231211111133131211113313331333133313331323132313331333133313331322331231   <<    C312312111111331312111133133313331333133313231323133313331333133313223312313   >>      C312312111111331312111133133313331333133313231323133313331333133313223312312   >>