Scott and Virgil are playing a game. In the game the first player says 1, 2 or 3, then the next player can add 1, 2 or 3 to the number and so on. The player who is forced to say 21 or above loses. The first game went like so:
To give him a better chance of winning, Scott lets Virgil choose whether to go first or second in the next game. What should Virgil do?