What does program compare to result in a solved key/solution?

(Tame,Wild) = Collision
k = k1 + Tame.dist - Wild.dist

Tame File:

Wild File:

Those are from Tame and Wild files. What exactly does the program look for in those 2 lines above to result in solved key? Can anyone break it down by line and what the line/characters represent?  Thanks.