In July 1992, Mattel released "Teen Talk Barbie", which spoke a number of phrases including "Will we ever have enough clothes?", "I love shopping!", and "Wanna have a pizza party?" Each doll was programmed to say four out of 270 possible phrases, so that no two given dolls were likely to be the same (the number of possible combinations is formula_1). One of these 270 phrases was "Math class is tough!". Although only about 1.5% of all the dolls sold said the phrase, it led to criticism from the American Association of University Women. In October 1992, Mattel announced that "Teen Talk Barbie" would no longer say the phrase, and offered a swap to anyone who owned a doll that did.