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.*;
import java.lang.*;
import java.util.*;
import javafx.util.Pair;

public class NewMain1 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
//        ArrayList<Pair<Integer,Integer>> pair = new ArrayList<>();
//        ArrayList<Character> car = new ArrayList<Character>();
        ArrayList<Integer> iar = new ArrayList<Integer>();
        iar.add(sc.nextInt());
        iar.add(sc.nextInt());  
        int max=Collections.max(iar);
        int c=7-max;
        if(c==6)
            System.out.println(1+"/"+1);
        else if(c==4)
            System.out.println(2+"/"+3);
        else if(c==3)
            System.out.println(1+"/"+2);
        else if (c==2) 
            System.out.println(1+"/"+3);
        else
            System.out.println(c+"/"+6);
    }
}