A lovely worksheet, thanks for sharing! I found it quite challenging - got it right on my 3rd attempt! It threw me for a loop (pun not intended) that there is no end or beginning, but I enjoyed it!
I tried doing your exercise, but I got lost somewhere: there were two pieces with ON on the left side, I think that may have been the problem.
Anyway, it is a great idea, thank you for sharing it.
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