C1111233131211111211113313331333133313331333131211113312111133223311   >>    C111123313121111121111331333133313331333133313121111331211113322331   <<    C1111233131211111211113313331333133313331333131211113312111133223313   >>      C1111233131211111211113313331333133313331333131211113312111133223312   >>