1. A known needle in a known haystack
2. A known needle in an unknown haystack
3. An unknown needle in an unknown haystack
4. Any needle in a haystack
5. The sharpest needle in a haystack
6. Most of the sharpest needles in a haystack
7. All the needles in a haystack
8. Affirmation of no needles in the haystack
9. Things like needles in any haystack
10. Let me know whenever a new needle shows up
11. Where are the haystacks
12. Needles, haystacks whatever