Scrabble letter distributions "X" are not used in Turkish and therefore do not appear in the set. Blanks may not represent these letters, meaning loanwords that may use them may not appear in the game at all. Tuvan-language Scrabble sets, which use Cyrillic letters, use these 125 tiles: The distribution lacks four letters used only in loanwords: Ф, Ц, Щ, and Ь. This version is made for educational purposes and is not an official edition by Mattel. An optimum Ukrainian-language Scrabble sets, which use Cyrillic letters, contain 104 tiles using this distribution: The apostrophe sign is also included, even though it is not
Scrabble CH in the "Collins Scrabble Words" lexicon. In 1938, American architect Alfred Mosher Butts created the game as a variation on an earlier word game he invented called "Lexiko". The two games had the same set of letter tiles, whose distributions and point values Butts worked out by performing a frequency analysis of letters from various sources, including "The New York Times". The new game, which he called "Criss-Crosswords," added the 15×15 gameboard and the crossword-style game play. He manufactured a few sets himself, but was not successful in selling the game to any major game manufacturers of the day.