 It was totally impracticable to generate the 22 million characters from all five of the "chi" wheels, so it was initially limited to 41 × 31 = 1271 from the first two.After explaining his findings to Max Newman, Newman was given the job of developing an automated approach to comparing ciphertext and key to look for departures from randomness.The first machine was dubbed Heath Robinson, but the much faster Colossus computer, developed by Tommy Flowers and using algorithms written by Tutte and his colleagues, soon took over for breaking codes.