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 input = new Scanner(System.in);
//        ArrayList<Pair<Integer,Integer>> pair = new ArrayList<>();
        ArrayList<Character> ar = new ArrayList<Character>();
        ArrayList<Integer> re = new ArrayList<Integer>();
        float []arr={1,2,3,4,5,6};
        float y=input.nextInt();
        float w=input.nextInt();
        float max=Math.max(y,w);
        float c=0;
        for (int i = 0; i < 6; i++) {
            if(arr[i]>=max){
            c++;
            }
        }
        float s=6;
        if(c%2.0==0.0){
            c=c/2;
            s=3;
        }
        if(c%3.0==0.0){
            c=c/3;
            s=2;
        }
        if(c%6.0==0.0){
            c=c/3;
            s=1;
        }
        System.out.println(((int)c)+"/"+((int)s));
    }
    
}