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 Solution2{
	
	public static void main(String args[]) {
		Scanner s = new Scanner(System.in);
		int w = s.nextInt();
		int y = s.nextInt();
		int d = 6 - Math.max(w , y) + 1;
	    int r1 = d % 2;
	    int r2 = d % 3;
	    if(r1 == 0 && r2 == 0){
	        System.out.println("1/1");
	    }else if(r1 == 0 && r2 != 0){
	        int n = d / 2;
	        String st = "" + n;
	        System.out.println(st + "/3");
	    }else if(r1 != 0 && r2 == 0){
	        int n = d / 3;
	        String st = "" + n;
	        System.out.println(st + "/2");
	    }else {
	    	String st = "" + d;
	    	System.out.println(st + "/6");
	    }
	}
}