That was my point Throck but I did not express it as well as you. X>Y is true even if Y = 0.
We know the completed grid can contain either 5 Xs or 5 Ys but not both.
You could read the instruction as highlight all 5 Xs and 0, 1, 2, 3 or 4 Ys.
There seems to be real ambiguity. That’s why I thought my second word must be wrong.