def test_88888888():
assert number(88888888) == ('はっせんはっぴゃくはちじゅうはちまん' 'はっせんはっぴゃくはちじゅうはち')
def test_four():
assert number(4) == 'よん'
def test_8007():
assert number(8007) == 'はっせんなな'
def test_10000():
assert number(10000) == 'まん'
def test_zero():
assert number(0) == 'ぜろ'
def test_3010():
assert number(3010) == 'さんぜんじゅう'
def test_601():
assert number(601) == 'ろっぴゃくいち'
def test_845():
assert number(845) == 'はっぴゃくよんじゅうご'
def test_100():
assert number(100) == 'ひゃく'
def test_310():
assert number(310) == 'さんびゃくじゅう'
def test_99():
assert number(99) == 'きゅうじゅうきゅう'
def test_40():
assert number(40) == 'よんじゅう'
def test_27():
assert number(27) == 'にじゅうなな'
def test_negative():
with pytest.raises(ValueError):
number(-5)
def test_ten():
assert number(10) == 'じゅう'