I blew it as I didn't know there could be two of the same letter in the word. I'm not sure where I got that silly thought, but it sunk me today. Otherwise, it would have been line 4 because at that point, I was building words to eliminate letters.
When I'm stumped I automatically start looking at the letters that haven't been used yet, that's the technique that'll make you miss the doubles. On my 5th guess I used a word even though I knew at least two of those letters were wrong, but it was 5 letters I hadn't used yet, and it got me a third green letter, which was all I needed to figure it out.