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 A{
    private static int max(int n, int m) {
	return n > m ? n : m;
    }
	
    public static void main(String[] args){
    	Scanner in = new Scanner(System.in);
    	int n, m;
    	n = in.nextInt(); m = in.nextInt();
    	m = max(n, m);
    	switch (m){
    	case 1:
    		System.out.println("1/1");
    		break;
    	case 2:
    		System.out.println("5/6");
    		break;
    	case 3:
    		System.out.println("2/3");
    		break;
    	case 4:
    		System.out.println("1/2");
    		break;
    	case 5:
    		System.out.println("1/3");
    		break;
    	case 6:
    		System.out.println("1/6");
    	}
    }
}