import java.util.Scanner;

public class Season6Test1v1Task1 {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int tries = 0;

		while(true){
			boolean validInput1 = false;
			boolean validInput2 = false;
			System.out.println("enter cards");
			char firstCard = sc.next().charAt(0);
			char secondCard = sc.next().charAt(0);

			if((firstCard>'2'&&firstCard<'9')|| firstCard=='T'||firstCard=='J'||firstCard=='Q'||firstCard=='K'||firstCard=='A'){
				validInput1 = true;
			}

			if((secondCard>'2'&&secondCard<'9')|| secondCard!='T'&&secondCard=='J'||secondCard=='Q'||secondCard=='K'||secondCard=='A'){
				validInput2 = true;
			}
			if(!(validInput1&&validInput2)){
				System.out.println("Invalid input!");
			}
			if(firstCard=='A'&&secondCard=='A'){
				System.out.println("Two aces! Number of tries: "+tries);
				break;
			}
			else{
				tries++;
			}
		}
	}

}