# unhandled.py


def inc_by_4(val):
    return val + 4


def inc_list_by_4(lst):
    new_lst = []
    for val in lst:
        new_lst.append(inc_by_4(val))
    return new_lst


def main():
    my_lst = [1, 2, 3, 4, "frog"]
    new_lst = inc_list_by_4(my_lst)
    print(new_lst)


if __name__ == "__main__":
    main()