C1111233131211111211113313231333133313331323331333133313232221223311   >>    C111123313121111121111331323133313331333132333133313331323222122331   <<    C1111233131211111211113313231333133313331323331333133313232221223313   >>      C1111233131211111211113313231333133313331323331333133313232221223312   >>