It looks like you’ve provided a string of text:

For "thmyl": t (row1) → up? No letter above row1. So maybe shift down: t→g? t row1 down is g (row2). Let's check: t->g, h->y? h row2 down to row3? row2 h -> row3 n? No. Let's stop guessing.

: if you just need a paper written about the given string, I can write it as a cryptanalysis exercise.