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;
import java.util.ArrayList;
import java.util.Arrays;
public class Main {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
       int w=scan.nextInt();
       int y=scan.nextInt();
       int max;
        String   prob;
       if(w>=y)
           max=w;
       else
           max=y;
       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");
       else System.out.println("1/6");



        }

    }

