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.InputStreamReader;
import java.util.StringTokenizer;

public class CF9A {

    public static void main(String[] args) throws Exception {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb = new StringBuilder();
        StringTokenizer st = new StringTokenizer(in.readLine());
        int y = Integer.parseInt(st.nextToken());
        int w = Integer.parseInt(st.nextToken());
        int min = Math.max(w, y);
        int p = 6 - min + 1;
        int q = 6;
        for(int i=2;i<Math.max(q,p);++i){
            if(p%i == 0 && q%i==0){
                p/=i;
                q/=i;
                --i;
            }
        }

        sb.append(p+"/"+q).append("\n");
        System.out.println(new String(sb));
    }
}
