The game: You get a pair of words. In order to win, you have to transform the former word into the latter one in the least number of steps possible. A lower average of steps means more efficient solving. The rules: On each step, you have to transform the previous word by one of the following: 1. Changing the letters' position. For instance, the word "team" can be transformed into "meat", "tame" or "mate". 2. Adding/deleting one of the letters. For instance, the word "mate" can be changed to "m