team. If the ball leaves the field of play, possession is taken by the team that did not hit touch the ball last before going out of bounds. Button may be manually manipulated at intervals determined by the governing rule system, usually only during stoppages in play. For corner kicks, free kicks, and penalty shots, the ball is placed in the appropriate location and a button is placed behind it at the attacking player's discretion. Throw-ins and goal kicks are simulated by placing the ball at the appropriate location, then either flicking the ball with disk or goalkeeper, or again by lining up a button behind the ball (depending on the rules of the particular rule system). Fouls may also be declared for gameplay offenses such as affecting pieces or the ball at inappropriate times, touching the opposing player's pieces, or unsportsmanlike conduct. Specific rules are defined for each rule system, with the primary difference being the number of touches each team may have per possession. Rule systems The various rule systems differ predominantly regarding the number of touches each team may have. They will also cover specific guidelines equipment and game conduct . Within Brazil and Hungary, there are three most popular rule systems: Twelve-touch ("Paulista" or from São Paulo state) Game duration: two 10-minutes halves. Number of touches: 12 per team per possession, no more than 3 with any field piece Principal characteristics: Higher scoring than conventional soccer. This style of play favors skilled touches and shooting rather than offensive strategy. Defensive strategy plays a more significant role in the positioning and marking of offensive pieces. A variation used mostly in informal games places no limit to the number of consecutive touches by a team in possession of the ball, or by any of its pieces. While favoring ball control, this mode allows skilled players to stall games and play by the clock. This is the most widely used rule system in Hungary and Brazil, highly favored at international tournaments. Three-touch ( "Regra Carioca" or from Rio de Janeiro state) Game duration: two 25-minutes halves Number of touches: 3 per team per possession, shots on goal only following a pass Principal characteristics: Scoring typical of conventional football. Strategy primarily revolves around limiting opposing team shots on goal. One-touch ("Baiana" or from Bahia state) Game duration: two 25-minutes halves Number of touches: 1 per team per possession; 2 at