C111123313121111121111331333133313331331121111113313331333133313223131211   >>    C11112331312111112111133133313331333133112111111331333133313331322313121   <<    C111123313121111121111331333133313331331121111113313331333133313223131213   >>      C111123313121111121111331333133313331331121111113313331333133313223131212   >>