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 Runner{

     public static void main(String []args){
       Scanner s = new Scanner(System.in);
       
		int y = s.nextInt();
		int w = s.nextInt();
	   
		double cur = 0;
		
		if(y>w){
			cur = y;
		}else{
			cur = w;
		}
		
		double prob = (6-cur+1)/6;
		prob = Math.round(prob*100.0)/100.0;
		
		if(prob == .5){
			System.out.println("1/2");
		}else if (prob == .17){
			System.out.println("1/6");
		}else if (prob == .33){
			System.out.println("1/3");
		}else if (prob == .5){
			System.out.println("1/2");
		}else if (prob == .67){
			System.out.println("2/3");
		}else if (prob == .83){
			System.out.println("5/6");
		}else if (prob == 1){
			System.out.println("1");
		}
		
     }
}


