def test_99(): assert num2eng4.num_to_english(99) == "ninety-nine"
def test_88(): assert num2eng4.num_to_english(88) == "eighty-eight"
def test_90(): assert num2eng4.num_to_english(90) == "ninety"
def test_77(): assert num2eng4.num_to_english(77) == "seventy-seven"
def test_80(): assert num2eng4.num_to_english(80) == "eighty"
def test_101(): assert num2eng4.num_to_english(101) == "Invalid"
def test_nine(): assert num2eng4.num_to_english(9) == "nine"
def test_33(): assert num2eng4.num_to_english(33) == "thirty-three"
def test_55(): assert num2eng4.num_to_english(55) == "fifty-five"
def test_20(): assert num2eng4.num_to_english(20) == "twenty"
def test_21(): assert num2eng4.num_to_english(21) == "twenty-one"
def test_19(): assert num2eng4.num_to_english(19) == "nineteen"
def test_11(): assert num2eng4.num_to_english(11) == "eleven"
def test_ten(): assert num2eng4.num_to_english(10) == "ten"
def test_negative(): assert num2eng4.num_to_english(-5) == "Invalid"
def test_59(): assert num2eng4.num_to_english(59) == "fifty-nine"
def test_100(): assert num2eng4.num_to_english(100) == "one-hundred"
def test_70(): assert num2eng4.num_to_english(70) == "seventy"
def test_zero(): assert num2eng4.num_to_english(0) == "zero"
def test_one(): assert num2eng4.num_to_english(1) == "one"