Does Allah have 99 letters in his name?

[I was asked the question by a little boy.]
1: “Does Allah have 99 letters in his name?”
2: No, he has 99 names.
1: So how many letters in his name?  Is it 99, Yes or No?
2: Good question…OK let me find out.
…
So I found out.
Allah has the letters: Alif, Lam, Lam, Haa (In Arabic)
There are 4 letters in his name…