def user_input():
    filename = input("please enter full name and extenstion of  file to be compared: ")

    with open(filename, 'r') as open_file:
        made_to_list = open_file.read()
        made_to_list = made_to_list.split() #split makes each name a string element of the array all_text
    return made_to_list


def list_comparator(list1, list2):
    common_element = []
    for element in list1:
        if element in list2:
            common_element.append(element)
    return common_element

if __name__ == '__main__':

    print("The common items between the two lists u entered are: \n" +str(list_comparator(user_input(), user_input())))