Code No. (0 = Top Code/ID) X-AP/Branch No. (0-3) 0 = X-AP, 1 = Within Simple, 2 = Within Complex 1 = Branch, 2 = Exit Codes & Save, -2 = Exit Codes & Erase Perform if Difficulty is X or harder: (1 Easy, 2, 3, 4, 5 Hard)