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.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.StreamTokenizer;
public class Main {
    StreamTokenizer in;
    BufferedReader inb;
    PrintWriter out;


    public static void main(String[] args) throws Exception {
        new Main().run();
    }
    public void run() throws Exception{
        inb = new BufferedReader(new InputStreamReader(System.in));
        in = new StreamTokenizer(inb);
        out = new PrintWriter(new OutputStreamWriter(System.out));
        prog();
        out.flush();
    }
    int nextInt() throws Exception {
        in.nextToken();
        return (int) in.nval;
    }

    public void prog() throws Exception {
    	int a=nextInt();
    	int b=nextInt();
    	int c=7-Math.max(a,b);
    	int z=6;
    	if(z%c==0) { z=z/c; c=1; }
    	if(c==0) z=1;
    	out.print(c); out.print("/"); out.print(z);
    	
    	
    	
    }
                

}