LLMs are vulnerable to your input because they are still computers, but you're setting it up to fail with how you've given it the problems. Humans would fail in similar ways. The only thing you've proven with this reply is that you think you're clever, but really, you are not thinking, period.
And if a human failed on this question, that's because they weren't paying attention and made the same pattern matching mistake. But we're not paying the LLM to pattern match, we're paying them to answer correctly. Humans can think.
“paying the LLM”??