If anyone's curious what the code says, it's basically coordinates for a hiragana chart. For a number like 12 you'd read as 1-2 and go to the 1st set and take the 2nd character (so 1st set is "a i u e o" and the 2nd character is "i"). 111 is 11-1 or the "n" character. So deciphering the code reads "ta-i-i-ku-ka-n-u-ra-ni-ko-i" or "come to the back of the gym".