Write 20 sentences that end with "p" in the final word before the period or other punctuation.

Succeeded on ChatGPT, pretty close on gemma3:4b -- the exceptions usually ending with a "puh" sound...

Good one. I do seem to get consistently good results on Gemini 2.5 when using the slightly more explicit "Write 20 sentences where the very last character of each sentence is the letter 'p'."

for ChatGPT try the "o" version: Write 20 sentences that end with "o"