Morse code encoded the same way (A, O, E, I, T, M, N, R, K, etc.). Bulgarian alphabet contains 30 characters, which exactly match all possible combinations of 1, 2, 3, and 4 dots and dashes. Russian requires 1 extra character, "Ы" which is encoded with 5 elements. During early World War I (1914–1916), Germany briefly experimented with 'dotty' and 'dashy' Morse, in essence adding a dot or a dash at the end of each Morse symbol. Each one was quickly broken by Allied SIGINT, and standard Morse was restored by Spring 1916. Only a small percentage of Western Front (North Atlantic
American Morse code shorter dash, leads to the advantage of a more compressed code and a faster sending rate. The same operator could send at least 20% faster with American Morse than with International Morse. The greater complexity of American Morse meant that it was easier for operators to make errors. American Morse has multiple lengths of dashes and spaces and inadvertently transmitting the wrong ones and other timing errors by novice operators is known as hog-Morse. Over time, with the disappearance of landline telegraphy, and the end of commercial radio use of Morse Code, American Morse has become nearly extinct in some