Research
You dig nine holes for your research. You should always do research with nine variables so you can compare them and so there's an uneven number.
Imagine carefully digging nine holes so you can do your research. Hmm, I wonder what kind of research these holes are for...
きゅう
きわ
None
You are researching cucumbers (きゅう)!
Put nine full grown cucumbers into their holes so you can research what happens next.