def test_1(self):
s = 'barfoothefoobarman'
words = ['foo', 'bar']
self.assertCountEqual(find_substring(s, words), [0, 9])
def test_6(self):
s = ''
words = []
self.assertCountEqual(find_substring(s, words), [])
def test_4(self):
s = 'wordgoodgoodgoodbestword'
words = ['word', 'good', 'best', 'good']
self.assertCountEqual(find_substring(s, words), [8])
def test_5(self):
s = 'lingmindraboofooowingdingbarrwingmonkeypoundcake'
words = ['fooo', 'barr', 'wing', 'ding', 'wing']
self.assertCountEqual(find_substring(s, words), [13])
def test_3(self):
s = 'barfoofoobarthefoobarman'
words = ['bar', 'foo', 'the']
self.assertCountEqual(find_substring(s, words), [6, 9, 12])