C312312111111331312111133133313331322331333133313331323331323133313231232311   >>    C31231211111133131211113313331333132233133313331333132333132313331323123231   <<    C312312111111331312111133133313331322331333133313331323331323133313231232313   >>      C312312111111331312111133133313331322331333133313331323331323133313231232312   >>