I'll take an H, please!

Here's a tip... when you start a new puzzle, write down all letters on a piece of paper, paste the puzzle into Word twice. Mark one of them (keep the other as a "backup" in case you mess something up).

Go Edit>Replace and simply replace each letter with the hyphen. Write on your paper how many there are of each letter. Then you are well on your way to get it right. For each letter chosen, put a mark by the letter so you can easily see which have been chosen, and you ship them each time you replace more letters. Comprende?