def test_1(self):
sol = Solution()
lst = 'ab'
res = sol.get_res(lst)
self.assertItemsEqual(
res,
['AB', 'Ab', 'aB', 'ab']
)
def test_2(self):
sol = Solution()
lst = 'abc'
res = sol.get_res(lst)
self.assertItemsEqual(
res,
['ABC', 'ABc', 'AbC', 'Abc', 'aBC', 'aBc', 'abC', 'abc']
)