Mine works fine for the letters but where do all the numbers come from in the random tests? Am I supposed to accept outside variables as the array to edit or? How am I supposed to do this

when I run the example tests I pass but with the actual tests my code always times out and im not sure why since it prints technically the correct answers if I use print instead of return (but of course it doesnt accept printed answers) but when using return it just times out for some reason.