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.*;
import java.math.*;
import java.io.*;

/**
 *
 * @author magzhan
 */
public class Main {
    
    
    public static int gcd(int x, int y) {
        BigInteger bx = BigInteger.valueOf(x);
        BigInteger by = BigInteger.valueOf(y);
        BigInteger bgcd = bx.gcd(by);
        return bgcd.intValue();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        try {
        
            Scanner in = new Scanner(System.in);
           
            int y = in.nextInt();
            int w = in.nextInt();
            
            int max = Math.max(y, w);
            
            int t = 6 - max + 1;
            int g = gcd(t, 6);
            int a = t / g;
            int b = 6 / g;
            
            System.out.println(a + "/" + b);
            
        } catch(Exception ex) {
        
            System.out.println(ex.toString());
        }
    }
    
}
