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 static java.lang.Math.*;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.util.Scanner;

public class ProblemSolving
{
    static Scanner in=new Scanner(System.in);
    static OutputStream outputStream = System.out;
    static PrintWriter out = new PrintWriter(outputStream);
    public static void main(String[] args)
    {
    	int n = in.nextInt();
    	int m = in.nextInt();
        int ans=max(n,m);
        if(ans==6)
            System.out.println("1/6");
        else if(ans==5)
        	System.out.println("1/3");
        else if(ans==4)
        	System.out.println("1/2");
        else if(ans==3)
        	System.out.println("2/3");
        else if(ans==2)
        	System.out.println("5/6");
        else
        	System.out.println("1/1");
    	in.close();
        out.close();
    }
	
}
