Examples
- BRONTE is a letter bank of the classic Shakespeare quote "To be, or not to be".
- SENT, TENS, and NEST are each a letter bank of "Tennessee".
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A letter bank is a relative of the anagram where all the letters of one word (the "bank") can be used as many times as desired (minimum of once each) to make a new word or phrase. For example, IMPS is a bank of MISSISSIPPI and SPROUT is a bank of SUPPORT OUR TROOPS.
The term was coined by Will Shortz at the 1980 convention of the National Puzzlers League. This puzzle type is the basis for the word game Alpha Blitz .[ citation needed ]
An imperfect anagram letter bank algorithm can be used to correct spelling mistakes, overcome transposition, dyslexic errors and double letter errors. Combined with other algorithms such as soundex, metaphone, and Levenshtein distance, it could make a very powerful "did you mean?" response to search engine queries.[ original research? ]
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An anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once. For example, the word anagram itself can be rearranged into nag a ram; which is an Easter egg in Google when searching for the word "anagram"; the word binary-into brainy and the word adobe-into abode.
In communications and information processing, code is a system of rules to convert information—such as a letter, word, sound, image, or gesture—into another form, sometimes shortened or secret, for communication through a communication channel or storage in a storage medium. An early example is an invention of language, which enabled a person, through speech, to communicate what they thought, saw, heard, or felt to others. But speech limits the range of communication to the distance a voice can carry and limits the audience to those present when the speech is uttered. The invention of writing, which converted spoken language into visual symbols, extended the range of communication across space and time.
A checksum is a small-sized block of data derived from another block of digital data for the purpose of detecting errors that may have been introduced during its transmission or storage. By themselves, checksums are often used to verify data integrity but are not relied upon to verify data authenticity.
In information theory and coding theory with applications in computer science and telecommunication, error detection and correction (EDAC) or error control are techniques that enable reliable delivery of digital data over unreliable communication channels. Many communication channels are subject to channel noise, and thus errors may be introduced during transmission from the source to a receiver. Error detection techniques allow detecting such errors, while error correction enables reconstruction of the original data in many cases.
In information theory, the Hamming distance between two strings or vectors of equal length is the number of positions at which the corresponding symbols are different. In other words, it measures the minimum number of substitutions required to change one string into the other, or equivalently, the minimum number of errors that could have transformed one string into the other. In a more general context, the Hamming distance is one of several string metrics for measuring the edit distance between two sequences. It is named after the American mathematician Richard Hamming.
In cryptography, a transposition cipher is a method of encryption which scrambles the positions of characters (transposition) without changing the characters themselves. Transposition ciphers reorder units of plaintext according to a regular system to produce a ciphertext which is a permutation of the plaintext. They differ from substitution ciphers, which do not change the position of units of plaintext but instead change the units themselves. Despite the difference between transposition and substitution operations, they are often combined, as in historical ciphers like the ADFGVX cipher or complex high-quality encryption methods like the modern Advanced Encryption Standard (AES).
Anagrams is a tile-based word game that involves rearranging letter tiles to form words.
A cryptic crossword is a crossword puzzle in which each clue is a word puzzle. Cryptic crosswords are particularly popular in the United Kingdom, where they originated, as well as Ireland, Israel, the Netherlands, and in several Commonwealth nations, including Australia, Canada, India, Kenya, Malta, New Zealand, and South Africa. Compilers of cryptic crosswords are commonly called "setters" in the UK and "constructors" in the US. Particularly in the UK, a distinction may be made between cryptics and "quick" crosswords, and sometimes two sets of clues are given for a single puzzle grid.
In bioinformatics, BLAST is an algorithm and program for comparing primary biological sequence information, such as the amino-acid sequences of proteins or the nucleotides of DNA and/or RNA sequences. A BLAST search enables a researcher to compare a subject protein or nucleotide sequence with a library or database of sequences, and identify database sequences that resemble the query sequence above a certain threshold. For example, following the discovery of a previously unknown gene in the mouse, a scientist will typically perform a BLAST search of the human genome to see if humans carry a similar gene; BLAST will identify sequences in the human genome that resemble the mouse gene based on similarity of sequence.
A check digit is a form of redundancy check used for error detection on identification numbers, such as bank account numbers, which are used in an application where they will at least sometimes be input manually. It is analogous to a binary parity bit used to check for errors in computer-generated data. It consists of one or more digits computed by an algorithm from the other digits in the sequence input.
In software, a spell checker is a software feature that checks for misspellings in a text. Spell-checking features are often embedded in software or services, such as a word processor, email client, electronic dictionary, or search engine.
Jumble is a word puzzle with a clue, a drawing illustrating the clue, and a set of words, each of which is “jumbled” by scrambling its letters. A solver reconstructs the words, and then arranges letters at marked positions in the words to spell the answer phrase to the clue. The clue, and sometimes the illustration, provide hints about the answer phrase, which frequently uses a homophone or pun.
In the main type of anagram dictionary, the letters in words or phrases are rearranged in alphabetical order, and these transpositions are themselves then ordered alphabetically within word-length groups, so that any words consisting of this group of letters can be found. This arrangement is designed for use in solving word puzzles such as crosswords, or for playing games such as Scrabble. The first such anagram dictionary was The Crossword Anagram Dictionary by R.J. Edwards
Crosswords DS is a puzzle video game developed by American studio Nuevo Retro games released by Nintendo for the Nintendo DS handheld video game console. It was previously released in Australia as CrossworDS but a new OFLC entry confirmed that Nintendo Australia re-released it with a European localization. Crosswords DS features over 1,000 crossword puzzles that the player solves by using the stylus. Despite the title, it also features word search puzzles and anagram puzzles. It makes use of similar handwriting mechanics that the Brain Age titles make use of. Crosswords DS is included in the Touch! Generations series of titles, which includes such popular games as Brain Age: Train Your Brain in Minutes a Day! and Nintendogs. The background music was composed by Fabian Del Priore.
Spelling suggestion is a feature of many computer software applications used to suggest plausible replacements for words that are likely to have been misspelled.
Scrabble variants are games created by changing the normal Scrabble rules or equipment.
T9 is a predictive text technology for mobile phones, originally developed by Tegic Communications, now part of Nuance Communications. T9 stands for Text on 9 keys.
In linguistic morphology and information retrieval, stemming is the process of reducing inflected words to their word stem, base or root form—generally a written word form. The stem need not be identical to the morphological root of the word; it is usually sufficient that related words map to the same stem, even if this stem is not in itself a valid root. Algorithms for stemming have been studied in computer science since the 1960s. Many search engines treat words with the same stem as synonyms as a kind of query expansion, a process called conflation.
An anatree is a data structure designed to solve anagrams. Solving an anagram is the problem of finding a word from a given list of letters. These problems are commonly encountered in word games like Scrabble or in newspaper crossword puzzles. The problem for the wordwheel also has the condition that the central letter appear in all the words framed with the given set. Some other conditions may be introduced regarding the frequency of each of the letters in the given input string. These problems are classified as Constraint satisfaction problem in computer science literature.
In information theory, the computationally bounded adversary problem is a different way of looking at the problem of sending data over a noisy channel. In previous models the best that could be done was ensuring correct decoding for up to d/2 errors, where d was the Hamming distance of the code. The problem with doing it this way is that it does not take into consideration the actual amount of computing power available to the adversary. Rather, it only concerns itself with how many bits of a given code word can change and still have the message decode properly. In the computationally bounded adversary model the channel – the adversary – is restricted to only being able to perform a reasonable amount of computation to decide which bits of the code word need to change. In other words, this model does not need to consider how many errors can possibly be handled, but only how many errors could possibly be introduced given a reasonable amount of computing power on the part of the adversary. Once the channel has been given this restriction it becomes possible to construct codes that are both faster to encode and decode compared to previous methods that can also handle a large number of errors.