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.io.PrintWriter;
import java.util.Scanner;

/**
 * 
 */

/**
 * 
 * https://codeforces.com/problemset/problem/9/A
 * @author Maksim
 *
 */
public class DieRoll {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
        final Scanner in = new Scanner(System.in);
        final PrintWriter out = new PrintWriter(System.out);
        final int y = in.nextInt();
        final int w = in.nextInt();
        final Solution solution = new Solution();
        out.println( solution.solution(y, w));
        out.close();
        in.close();
	}
	public static class Solution{
		
		public String solution(final int y, final int w){
			int numerator = 7-Math.max(y, w);
			int denominator = 6;
			for(int i=2;i<=3;i++){
				if(numerator%i==0){
					numerator/=i;
					denominator/=i;
				}
			}
			return String.format("%d/%d",numerator,denominator);
		}
		
	}
}


