C31231211111133131211113313331333133313331323133313223311212311   >>    C3123121111113313121111331333133313331333132313331322331121231   <<    C31231211111133131211113313331333133313331323133313223311212313   >>      C31231211111133131211113313331333133313331323133313223311212312   >>