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.*;
import java.lang.*;

public class Main{
    
    public static void main(String[] args){
        Scanner scn = new Scanner(System.in);
        //String x = scn.nextLine();
        int x = scn.nextInt();
        int y = scn.nextInt();
        int max = Math.max(x,y);
        int z = 6 - max+1;
        //System.out.println(z);
        
        if(z%2==0){
            int n = z/2;
            int d = 3;
            System.out.println(n+"/"+3);
        }
        if(z%2!=0 && z==3){
            System.out.println("1/2");
        }
        if(z%2 != 0 && z!=3){
            System.out.println(z+"/"+6);
        }
        
    }
}

// 3 1 4 1 5 9 2 
// 9 1 2 7 
// 8 2 4 4 3 9 1 7 2 8 7 
// 42 
// 11 7 
// 1 1 1 1 1 1 1 1 