Which letter of the alphabet can you add four letters to without changing its pronunciation?

Why this works

This riddle plays on the concept of pronunciation and spelling. When you take the letter "Q" and add the letters "ueue" to it, the pronunciation remains the same: "Q." The letters "ueue" create a long sequence of letters that don't alter how you say the initial "Q," making it a clever example of how letters can shift in written form without affecting their spoken sound. It highlights the fun quirks of the English language!