@Simi_2210_ You would think 20, but what if the back of the shirt is just one big hole? What if it's two holes? There isn't enough information to answer the question. You'd have to show the back of the T-shirt.
@HussainShafiei Needs to be two opposition players between the attacker and the goal line when the ball is played. The goalkeeper is usually one of them, but not on this occasion.