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.*;
public final class Solution{
    public static void main(String args[]){
        Scanner scan=new Scanner(System.in);
        int y=scan.nextInt();
        int w=scan.nextInt();
        int max=Math.max(y,w);
        int d=6-max+1;
        if(d==1){
            System.out.print("1/6");
        }
        else if(d==2){
            System.out.print("1/3");
        }
        else if(d==3){
            System.out.print("1/2");
        }
        else if(d==4){
            System.out.print("2/3");
        }
        else if(d==5){
            System.out.print("5/6");
        }
        else{
            System.out.print("1/1");
        }
    }
}