It might also be 'Generation Algorithm', which also could be a hint as it seems we are looking for some algorithm to generate a key from the blocks in the artwork.
Guess what? The keypad in the cell is a QWERTY Keyboard. A QWERTY Keyboard has exactly 26 letter keys, only letters not including numbers nor special characters or other keys. Counting just the letters.
I totally overlooked that as a possible hint (while actually in the room/game atmosphere it stands out like a sore thumb).
According to the game "It's a full QWERTY keypad.", which is usually used referring to phones with keypads, so maybe something like this:
http://i.imgur.com/aJtoJDa.jpgBut that would still leave the too even distribution.
