I had no idea that was the meaning of the kanji. Thanks for clearing that up.
The way i remembered it was by looking at the rightmost vertical line on the lower part of the kanji (the 口 or 工 part) and if it was purely at the right then it was right, and if not all the way then it was left.
Looks like it doesnt any more. But in either case there are many lessons where you cqn click on something to see the right answer. I have dont this at times to write something sown for offli e self study. I think the feature is good for that. And since this isnt a test if someone were to use that to cheat they would be cheatimg themselves.