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

/**
 * Created by pkate on 9/21/2017.
 */
import java.util.*;
import java.lang.*;
import java.io.*;
public class Solution {
    public static void main(String []args) throws IOException{
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        String []data = br.readLine().split(" ");
        int x = Integer.parseInt(data[0]);
        int y = Integer.parseInt(data[1]);
        int c=(x>=y)?x:y;
//        System.out.println(c);
        StringBuilder sb = new StringBuilder();
        switch(c){
            case 0:
                sb.append("0/1");
                break;
            case 1:
                sb.append("1/1");
                break;
            case 2:
                sb.append("1/1");
                break;
            case 3:
                sb.append("2/3");
                break;
            case 4:
                sb.append("1/2");
                break;
            case 5:
                sb.append("1/3");
                break;
            case 6:
                sb.append("1/6");
                break;
            default:
                sb.append("0/1");
                break;
        }
        System.out.println(sb.toString());
    }

}
