C111123313121111121111331333133313331333133313121111113313331333133313223132211   >>    C11112331312111112111133133313331333133313331312111111331333133313331322313221   <<    C111123313121111121111331333133313331333133313121111113313331333133313223132213   >>      C111123313121111121111331333133313331333133313121111113313331333133313223132212   >>