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

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;
import java.util.StringTokenizer;


/**
 *
 * @author Abood
 */
public class Main{
    public static void main(String[] args) throws IOException {
 Scanner sc=new Scanner(System.in);
 
int a=sc.nextInt(),b=sc.nextInt();
a=Math.max(a, b);
a=7-a;
switch (a){
    case 1 : System.out.println("1/6");break;
        case 2 : System.out.println("1/3");break;
            case 3 : System.out.println("1/2");break;
                case 4: System.out.println("2/3");break;
                    case 5 : System.out.println("5/6");break;
                        case 6 : System.out.println("1");break;
   
}
}
}