Okay kiddo, so let me tell you about the rule of marteloio. Now, imagine you and your friend are playing a game of soccer and the ball goes out of bounds. The rule of marteloio is used when the players can't decide who touched the ball last before it went out of bounds. It's like a way to solve a disagreement between the players.
So, here's how it works: the team that was last in possession of the ball before it went out of bounds gets to keep it. But if both teams think they were the last to touch it, they have to go through a process called the rule of marteloio.
First, the referee will ask each team's captain to pick a different number between zero and nine, and keep it a secret. Then they will both show their number on their fingers at the same time. If the numbers match, the team that started the process gets to keep the ball. If the numbers don't match, they have to do it all over again until they get a match.
It's like a game of chance, but it's a fair way to decide who gets possession of the ball. So next time you're playing soccer and can't decide who touched the ball last, remember the rule of marteloio!