def f1(an_int):
    pass  # remove the word pass, and write your code here


def f2(an_int):
    pass  # remove the word pass, and write your code here


def f3(a_list):
    pass  # remove the word pass, and write your code here


def f4(a_list1, a_list2, an_int):
    pass  # remove the word pass, and write your code here


def f5(a_list):
    pass  # remove the word pass, and write your code here


def f6(a_str):
    pass  # remove the word pass, and write your code here


def f7(a_str):
    pass  # remove the word pass, and write your code here


def f8(a_str):
    pass  # remove the word pass, and write your code here