Scrabble of points for each lettered tile is based on the letter's frequency in standard English; commonly used letters such as vowels are worth one point, while less common letters score higher, with Q and Z each worth 10 points. The game also has two blank tiles that are unmarked and carry no point value. The blank tiles can be used as substitutes for any letter; once laid on the board, however, the choice is fixed. Other language sets use different letter set distributions with different point values. Tiles are usually made of wood or plastic and are square and thick,
Scrabble letter distributions and blank tiles cannot be used to represent these. Portuguese-language editions of Scrabble contain 120 tiles. While "Ç" is a separate tile, other diacritical marks are ignored. "K", "W", and "Y" are absent, since they are only present in loanwords in Portuguese, and were not even official letters until 2009. Romanian-language editions of Scrabble use these 100 tiles. Some amendment applied in updated version. Previously, the B was worth 8, and the O was worth 1. The original (1982) distribution used the following 100 tiles: Diacritical marks are ignored, so for example "Ă" and "Â" are played as "A". Both