def test_equal_2(self):
     self.assertEqual(
         letter_pattern(['general', 'admiral', 'piglets', 'secrets']),
         "*******")
 def test_equal_1(self):
     self.assertEqual(letter_pattern(['war', 'rad', 'dad']), "*a*")
 def test_equal_3(self):
     self.assertEqual(letter_pattern(['family']), "family")
 def test_equal_2(self):
     self.assertEqual(letter_pattern(
         ['general', 'admiral', 'piglets', 'secrets']), "*******")
 def test_equal_1(self):
     self.assertEqual(letter_pattern(['war', 'rad', 'dad']), "*a*")
 def test_equal_3(self):
     self.assertEqual(letter_pattern(['family']), "family")