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 class RollDie{
    public static void main(String[] args){

        Scanner sc = new Scanner(System.in);
        int x=sc.nextInt(),y=sc.nextInt();

        if(x>=y){
            if(x==1){
                System.out.println("1/1");
            }
            else if(x==2){
                System.out.println("5/6");
            }
            else if(x==3){
                System.out.println("2/3");
            }
            else if(x==4){
                System.out.println("1/2");
            }
            else if(x==5){
                System.out.println("1/3");
            }
            else if(x==6){
                System.out.println("1/6");
            }
            else{
                System.out.println("0/1");
            }
        }

        else{
            if(y==1){
                System.out.println("1/1");
            }
            else if(y==2){
                System.out.println("5/6");
            }
            else if(y==3){
                System.out.println("2/3");
            }
            else if(y==4){
                System.out.println("1/2");
            }
            else if(y==5){
                System.out.println("1/3");
            }
            else if(y==6){
                System.out.println("1/6");
            }
            else{
                System.out.println("0/1");
            }
        }
    }
}
