My difficulty is different. Move 1 is pretty clear (but it did take half an hour of gazing before it was staring me in the face) and Move 2 is exactly what the second verse requires in terms of moving from one thing to another ... but the bottom row? The implication is that the 7,5 isn't real words, but has those four irritating new letters - but not the ones needed to make the 7,5 correct. Ploy doesn't usually leave us hanging, and there's often un hareng rouge, as Poirot might say.