I may not have been on my A game i admit....but to me this hanjie is not possible logically without assuming the letters. about a fouth of the way through i found myself stuck....knowing the layout of the letters but not having a logical way of proving...i kept going assuming letters then it became logical again....only to be a guessing game again near the end....I give it a pass because it was simple...i just dont like not thinking logically and only going off of assumptions with hanjie puzzles.