Techniques for post-processing, e.g. correcting the recognition result

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n-gram a contiguous sequence of n items from a given sample of text. The items can be syllables, letters, words or base pairs according to the application. Typical examples are bi-grams and tri-grams. trie also called “digital tree” or “prefix tree”, is a type of tree data structure used for locating specific keys (items) from within a set of characters or words. In order to access a key (to recover its value, change it, or remove it), the trie is traversed (usually in a depth-first fashion), following the links between nodes.