coordinates;, each of these two side coordinates can then pair with the ten top coordinates (the singletons may serve in second position) to produce 20 two-digit groups. This configuration makes 28 ciphertext equivalents available for plaintext elements. It was used in 1937 with keyword M DEL VAYO, the M the initial of the agent, the DEL VAYO the name of a Spanish Communist. The two extra spaces were used for a period and a letter-number shift sign: 0987654321 mdel v a y 6 bcf ghuj knp qrstuwxz. / With this, e = 8, a = 5, b = 10, t = 27, and so on. There will be no single 2 or 1. The decipherer takes all 1's and 2's as the first digits of a two-digit group, and joins to it whatever digit follows. He takes any digits from 3 to 0 as individuals if they are not already part of a pair. Thus the ciphertext 828115125 can be unambiguously divided as828115125 and deciphered to Espana. Other configurations are possible
annaabi.ee 
