This does not seem to be forming a word. Since I know he can spell any number of words, I ask him, "What are you writing?"
He responds, "I don't know yet. I'm not done."
I love this moment. I love that he can think of letters as having infinite possibilities; that he can string them together to see what he gets. I love that he can remind me that you don't always have to know what your goal is; sometimes you can just see where the letters take you.