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

/**
 * Created by James on 1/8/2015.
 */
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;

public class Driver {
    public static void main(String [] args) throws IOException {
        BufferedReader scanner = new BufferedReader(new InputStreamReader(System.in));
        PrintWriter out = new PrintWriter(System.out);

        String [] pieces = scanner.readLine().split("\\s+");

        int Y = Integer.parseInt(pieces[0]), W = Integer.parseInt(pieces[1]);

        int max = Math.max(Y, W);

        switch (max) {
            case 6:
                out.println("1/6");
                break;
            case 5:
                out.println("1/3");
                break;
            case 4:
                out.println("1/2");
                break;
            case 3:
                out.println("2/3");
                break;
            case 2:
                out.println("5/6");
                break;
            case 1:
                out.println("1/1");
                break;
        }
    }
}
