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Our guides playing the ABCD game at IOI 2011 Rules explanation by Alexey: There's a gesture for each letter from A to D. On the start of each turn, every player shows the A gesture. Then, the player who's turns it is right now pronounces some random letter (from A to D) and also shows it's corresponding gesture. The moment he does that, all other players should also show some gesture (if they don't do anything, we suppose they show A because A is the initial position). After that, the player who's turn it
