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.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        TaskA solver = new TaskA();
        solver.solve(1, in, out);
        out.close();
    }

    static class TaskA {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int first = in.nextInt();
            int second = in.nextInt();
            int temp;
            if (first > second) {
                temp = first;
            } else {
                temp = second;
            }
            int sum = 6 - temp + 1;
            switch (sum) {
                case 0:
                    out.println("0/1");
                    break;
                case 1:
                    out.println("1/6");
                    break;
                case 2:
                    out.println("1/3");
                    break;
                case 3:
                    out.println("1/2");
                    break;
                case 4:
                    out.println("2/3");
                    break;
                case 5:
                    out.println("5/6");
                    break;
                case 6:
                    out.println("1/1");
                    break;
                default:
                    break;
            }
        }

    }
}

