C1111233131211111211113313331333133313232313331333133313112331231212311   >>    C111123313121111121111331333133313331323231333133313331311233123121231   <<    C1111233131211111211113313331333133313232313331333133313112331231212313   >>      C1111233131211111211113313331333133313232313331333133313112331231212312   >>