enabled to DVFK This means, of course, that DVDM replaces enable. If the plaintext and the code elements both run in alphabetical or numerical order, as above, the code is a one-part code, because a single book serves for both en- and decoding. If, however, the code equivalents stand in mixed order opposite their plaintext elements, like this Plaintext codenumber shield (for) 51648 shielded 07510 shielding 10983 shift(s) 43144 ship 35732 ships 10762 the code is a two-part code, because a second section, in which the code elements are in regular order, is required for decoding: codenumber plaintext 10980 was not 10981 spontaneous (ly) 10983 shielding 10986 April 13 10988 withdrawn from 10990 acknowledge In a sense, a code comprises a gigantic cipher alphabet, in which the basic plaintext unit is the word or