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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class Main {

    public static void main(String[] args) throws IOException {

        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer stk = new StringTokenizer(in.readLine());

        int Y = Integer.parseInt(stk.nextToken());
        int W = Integer.parseInt(stk.nextToken());

        int max = Math.max(Y, W);
        int ans = 6 - max + 1;
        
        if (ans == 1 || ans == 5) {
            System.out.println(ans + "/" + 6);
        } else if (ans == 2 || ans == 3 || ans == 6) {
            int simp = 6 / ans;
            System.out.println(1 + "/" + simp);
        } else {
            System.out.println(2 + "/" + 3);
        }
    }
}
