6 6
 1 4
 4 4
 3 3
 6 4
 6 3
 5 4
 5 6
 3 4
 1 3
 3 2
 5 5
 1 1
 2 1
 3 1
 3 5
 1 6
 6 5
 2 3
 4 3
 2 2
 3 6
 1 2
 6 1
 2 5
 4 5
 1 5
 6 2
 4 6
 5 1
 4 1
 5 2
 2 4
 2 6
 5 3

1/6
 1/2
 1/2
 2/3
 1/6
 1/6
 1/3
 1/6
 1/2
 2/3
 2/3
 1/3
 1/1
 5/6
 2/3
 1/3
 1/6
 1/6
 2/3
 1/2
 5/6
 1/6
 5/6
 1/6
 1/3
 1/3
 1/3
 1/6
 1/6
 1/3
 1/2
 1/3
 1/2
 1/6
 1/3

import java.util.Scanner;
public class project {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		
		int y = input.nextInt();
		int w = input.nextInt();
		
		int[] die = new int[6];
		int count = 1;
		boolean big = true;
		String[] res = {"1/6","1/3","1/2","2/3","5/6","1/1"};
//		int result = 1/count;
		
		for(int i=0 ; i<6 ; i++){
			die[i] = i+1;
		}
		
		int max = Math.max(y, w);
		for(int i=0 ; i<6 ; i++){
//			if(big){
				if(y == die[i]){
					count += 6-y;
//				}
//			}else{
//				if(w == die[i]){
//					count += 6-w;
//				}
			}
		}
		for(int i=0 ; i<6 ; i++){
			if(count == (i+1)){
				System.out.print(res[i]);
			}
		}
		
		
	}
}