Glitch - For one of the groups, the game for some reason awards a correct answer for a connection that is most certainly not what I put. Sorry if you come across this error, not sure why it's occurred!

IWhen entering acceptable answer fragments you have to put commas between the fragments but NOT after the last one. If you do that even a blank answer is treated as correct. Pretty sure that is how it works and hope it helps next time you set a grid.

Pretty obscure apart from the currencies.