<human>:  Can you explain the basic rules of mahjong to me?
<bot>: 
1. The basic rules of Mahjong is a game for four players.
2. To start the game, each player draws four random tiles, bringing their starting hands to thirteen tiles.
3. The main objective in Mahjong is to create the most combinations with the tiles in your hand.
4. In order to win the hand, a player must form two combinations or sets of tiles and one pair.
5. The points are calculated by the number of pungs, kongs, chows and flower tiles that a player holds in their hand.