code: def test_longest_match_with_popular_chars(self):
      a = "dabcd"
      b = (
          "d" * 100 + "abc" + "d" * 100
      )  # length over 200 so popular used
      sm = difflib.SequenceMatcher(a=a, b=b)
      match = sm.find_longest_match(0, len(a), 0, len(b))
      self.assertEqual(match.a, 0)
      self.assertEqual(match.b, 99)
      self.assertEqual(match.size, 5)
      self.assertEqual(
          a[match.a : match.a + match.size],
          b[match.b : match.b + match.size],
      )
      self.assertFalse(self.longer_match_exists(a, b, match.size))
  
imports: import difflib
  from test.support import findfile
  import unittest
  import doctest
  import sys
label_desc: Use image node_id 3 for calling the TestFindLongest obj's underlying member method code with example usage: obj.test_longest_match_with_popular_chars() without return types