At his point, is unknown, but it is the same for each equation. Rejewski does not know , but he knows it is one of the rotors (I, II, and III), and he knows the wiring for each of those rotors. There were only three rotors and 26 possible initial rotations. Consequently, there are only 84 possible values for . Rejewski can look at each possible value to see if the permutation is consistent. If there were no steckers ( were the identity), then each equation would produce the same .