input: Write a function that matches a string that has an a followed by zero or more b's by using regex.
  assert text_match("msb") == 'Not matched!'
  assert text_match("a0c") == 'Found a match!'
  assert text_match("abbc") == 'Found a match!'
  
output: def text_match(text):
      import re
      if re.match(r'a(b*)$', text):
          return 'Found a match!'
      else:
          return 'Not matched!'