C3123121111113313121111331333133313223313121111121111331333232232131221   >>    C312312111111331312111133133313331322331312111112111133133323223213122   <<    C3123121111113313121111331333133313223313121111121111331333232232131223   >>      C3123121111113313121111331333133313223313121111121111331333232232131222   >>