What is the rest of the Peter Piper riddle each letter?

The Peter Piper riddle goes: "Peter Piper picked a peck of pickled peppers. A peck of pickled peppers Peter Piper picked. If Peter Piper picked a peck of pickled peppers, where's the peck of pickled peppers that Peter Piper picked?" It plays with tongue-twisting sounds and challenges the listener to think about the location of the peppers. The riddle is often used to showcase alliteration and phonetic skill.