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 org.w3c.dom.ls.LSOutput;

import javax.swing.*;
import java.math.BigInteger;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;
public class CP {
    public static int gcd(int x,int y){
            if(y==0) return x;
            else return gcd(y,x%y);
        }
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
       int n =sc.nextInt(),k=sc.nextInt();
      int b = 7-Math.max(n,k);
       int f1=gcd(b,6);
        System.out.println((b/f1)+"/" + (6/f1));

    }

}