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.util.Scanner;

public class A {
    public static void main (String[]args){
        int y,w,d,atas,bawah,app,boot;
        Scanner scanner = new Scanner(System.in);

        y = scanner.nextInt();
        w = scanner.nextInt();
        if (y>w){
            w = y ;
        }
        d = (7 - w);
        app = d ;
        boot = 6 ;
        if (d%2 == 0){
            atas = d /2 ;
            bawah =  6/2;
            if(d == 6){
                atas = 1;
                bawah = 1 ;
            }
            app = atas ;
            boot = bawah;
        }
        if (d == 3){
            atas = 1 ;
            bawah = 2 ;
            app = atas ;
            boot = bawah;
        }
        System.out.println(+app+"/"+boot);
    }
}

		       	  	        			 	    	