input: Write a function to find all matches of the regex pattern "[6-9]|[2-4][0-9]" in a given string.
  assert find_matches("123456789") == ['6', '7', '8', '9']
  assert find_matches("abcdefg 234 567 890") == ['6', '7', '2', '3', '4']
  assert find_matches("no matches here!") == []
output: import re
  
  def find_matches(s):
      pattern = r"[6-9]|[2-4][0-9]"
      return re.findall(pattern, s)