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

/**
 * Created by Omar on 12/27/2015.
 */

import java.util.*;
import java.io.*;

public class DieRoll {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        //int n=Integer.parseInt(br.readLine());
        String[] parts=br.readLine().split(" ");
        //int[]a= new int[n];
        //for(int i=0;i<n;i++){a[i]=Integer.parseInt(parts[i]);}
        int Y=Integer.parseInt(parts[0]);
        int W=Integer.parseInt(parts[1]);

        int max=Math.max(Y,W);
//        int counter=0;
//        for(int i=max;i<=6;i++){
//            counter++;
//        }
        if(max==6)System.out.println("1/6");
        else if(max==1)System.out.println("1/1");
        else if(max==2)System.out.println("5/6");
        else if(max==3)System.out.println("2/3");
        else if(max==4)System.out.println("1/2");
        else if(max==5)System.out.println("1/3");


        br.close();
    }
}
