Each season, the 16 to 20 strangers are divided into two to four teams called "tribes". The tribes are usually given some tools to survive with, such as a machete, a pot, and water canteens to hold water. The tribes are encouraged to build shelters to protect themselves. In some seasons the tribes started with some food, such as rice, given by the show, and in other seasons, the tribes have no help in the beginning. Early seasons allowed players to bring one luxury item with them. Others seasons have brought players into the game unprepared, making them start with only the clothes they are wearing and the tools that are provided.