What parent is saying is that instead of asking the LLM to play a game of Wordle with tokens like TIME,LIME we ask it to play with tokens like T,I,M,E,L. This is easy to do.
And if you tell it to think up a word that has an E in position 3 and an L that's somewhere in the word but not in position 2, it's not going to be any better at that if you tell it to answer one letter at a time.