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"
