How can I spell a text by pressing different buttons?

Let's say that I have a button for every letter of the alphabet, and I want those buttons to show the respective letter on screen and spell a word. I tried using a label, but it only shows one letter at a time and I need to spell a full word. My only guess is by using multiple labels, but this seems long and tedious, so I was wondering if there are any other methods to achieve this.

See

Join the value of the selected button to the value of the label, and set this to the label.