def main():
    # Input should be in the format "first_name last_name"
    user_input = input("Enter name: ")
    blank_position = user_input.find(" ")
    # Bellow is an example of slicing strings, it changes the blank position of a first/last name into a $
    user_input = user_input[:blank_position] + $ + user_input[blank_position + 1:]

main()