def test3(self):
res = lab19.execute('aaaaa')
expected = 'aaaaa'
self.assertEqual(expected, res)
def test1(self):
res = lab19.execute('yabacrty')
expected = 'yabay'
self.assertEqual(expected, res)
def test2(self):
res = lab19.execute('babcad')
expected = 'bab'
self.assertEqual(expected, res)