def test_over_20(self):
     self.assertEqual(decipher_numalpha('29'), set(['bi']))
 def test_handle_0s(self):
     self.assertEqual(decipher_numalpha('10'), set(['j']))
 def test_example(self):
     self.assertEqual(decipher_numalpha('123'), set(['abc', 'lc', 'aw']))
 def test_simple_recursion(self):
     self.assertEqual(decipher_numalpha('12'), set(['ab', 'l']))
 def test_base1(self):
     self.assertEqual(decipher_numalpha('1'), set(['a']))
     self.assertEqual(decipher_numalpha('9'), set(['i']))
 def test_base0(self):
     self.assertEqual(decipher_numalpha(''), set([]))