win 4d4D or 4-dits is one of the most popular lotteries in Singapore besides Toto and Singapore Sweep. In this game, players can bet on any 4-dit number from 0000 to 9999.4D or 4-dits is one of the most popular lotteries in Singapore besides Toto and Singapore Sweep. In this game, players can bet on any 4-dit number from 0000 to 9999.