using python without using lists

Write a program that uses a loop to repeatedly prompt the user to enter words. If the user enters the word "halt", then the loop should terminate and the program should display the words that the user entered on a single line. Do not use lists. Here is an example run of the program: Enter a word or enter "halt" to quit: alpha Enter a word or enter "halt" to quit: bravo Enter a word or enter "halt" to quit: charlie Enter a word or enter "halt" to quit: halt alpha bravo charlie