C312312111111331312111133133313331333133322331333133311233132311   >>    C31231211111133131211113313331333133313332233133313331123313231   <<    C312312111111331312111133133313331333133322331333133311233132313   >>      C312312111111331312111133133313331333133322331333133311233132312   >>