def test_totalCharacters_1():
    assert totalCharacters(["this", "is", "a", "list"]) == 11
def test_totalCharacters_4():
    assert totalCharacters("1,2,3") == -1
def test_totalCharacters_5():
    assert totalCharacters([1, "2", "3"]) == -1
def test_totalCharacters_3():
    assert totalCharacters([]) == 0