The Swedish government has restricted 148 three-letter combinations from being used on license plates, officials say.

The Local reported Friday that in addition to such obvious letter series as SEX and XXX, the Swedish Road Administration has also banned the Swedish words for house (HUS), no (NEJ), and seven (SJU).

Other banned words include BAJ ('poop'), TOA ('toilet') and SUG (suck).

"We sit down in a room and think about it, then we remove the combinations which we judge to be offensive. People have very creative imaginations. But we have to be restrictive, otherwise we might run out of letter combinations for license plates," said road administration spokesman Mikael Andersson.