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.util.*;

public class Problem {
    
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int above = (a > b) ? a : b;
        int count = 0;
        for(; above < 7; above += 1);
        int denom = 6;
        if (above % 2 == 0) {
            above = above / 2;
            denom = denom / 2;
        }
        if (above % 3 == 0) {
            above = above / 3;
            denom = denom / 3;
        }
        if (above == 0) {
            System.out.println("0/1");
        } else {
            System.out.println(above + "/" + denom);
        }
    }
}
        
        