If you are talking about the strings like "Paper covers rock", "Rock smashes paper", etc., you could put each in a string literal at the top of the program like we've done for NUM_CIRCLES or MAX_RADIUS. You could have PAPER_WIN = "Paper covers rock" for example. Then your print statement would be print(PAPER_WIN).
You could mean, could you have a string which stores the message, and then a print statement after the conditional statement. That would be possible too. Use the conditional statement to store whatever you want printed in a variable like message, then after the conditional statement print(message)
Of course, you could do use both of these ideas together.