[Chris Heath]

As another option, you create a shape, e.g., a square, then double-click it and type a letter.

Resize the letter and shape to the appropriate size, and turn off the shape's stroke and fill (if desired), then select the shape, click the Make Table icon, then drag the bottom handle down, creating the required number of characters.

Result: A vertical set of letters (one above the other) will be displayed.

Last of all, overtype each letter with the relevant replacements.