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.max;
import java.util.Scanner;

/**
 *
 * @author CK
 */


public class ISSCT {
 static int gcd(int a,int b){
    if(a==b) return a;

    if(a>b) return gcd(a-b,b);
    return gcd(a,b-a);
  }
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        Scanner in = new Scanner(System.in);
        int x=in.nextInt(),y=in.nextInt();
        
        int mx= max(x,y);
        
        int up= 6-mx+1;
        
        int g=gcd(up,6);
        
        up=up/g;
        int down=6/g;
        
        System.out.println(up+"/"+down);
    }
    
}
