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A heterogram (from hetero-, meaning 'different', + -gram, meaning 'written') is a word, phrase, or sentence in which no letter of the alphabet occurs more than once. The terms isogram and nonpattern word have also been used to mean the same thing. [1] [2] [3] It is not clear who coined or popularized the term "heterogram".
The California Job Case was a compartmentalized box for printing in the 19th century, sizes corresponding to the commonality of letters. The frequency of letters in text has been studied for use in cryptanalysis, and frequency analysis in particular, dating back to the Arab mathematician al-Kindi (c. AD 801–873 ), who formally developed the method (the ciphers breakable by this technique go ...
Example game in which the letters A and N but not the whole word HANGMAN were guessed – incorrect guesses are noted at the bottom. Hangman is a guessing game for two or more players. One player thinks of a word, phrase, or sentence and the other(s) tries to guess it by suggesting letters or numbers within a certain number
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Numzi also has an iOS app which is a portable Major System number-word converter. 2Know is free Windows software for converting numbers to words (English, German, French). Mnemisis Another free mnemonic program - runs on Linux, Mac OS X, and Windows; Memagine iPhone app that uses the system to teach how to recall a list of up to 100 items in ...
Another method of substitution cipher is based on a keyword. All spaces and repeated letters are removed from a word or phrase, which the encoder then uses as the start of the cipher alphabet. The end of the cipher alphabet is the rest of the alphabet in order without repeating the letters in the keyword.
The words have a maximum length of six characters. [1] Instead of the traditional man to be hanged being shown in the picture, a monkey is shown hanging from the gallows by its arm. Hangman contains 510 words divided into four difficulty levels. [2] A timed mode where the player has to guess before a time limit expires is also available. [3]