code: def deflood(s, n=3):
      
      if n == 0:
          return s[0:0]
      return re.sub(r"((.)\2{%s,})" % (n-1), lambda m: m.group(1)[0] * n, s)
docs: Returns the string with no more than n repeated characters, e.g.,
          deflood("NIIIICE!!", n=1) => "Nice!"
          deflood("nice.....", n=3) => "nice..."