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.System.exit;
    import java.util.ArrayList;
    import java.util.LinkedList;
    import java.util.List;
    import java.util.Scanner;
    import java.util.*;
    /**
     *
     * @author abdelmagied
     */
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.Comparator;
    import java.util.HashMap;
    import java.util.LinkedList;
    import java.util.List;
    import java.util.Map;
    import java.util.Scanner;




    
public class JavaApplication1 { 
    

      public static void main(String[] arg){   
           Scanner sc = new Scanner(System.in);
           
           int n = sc.nextInt() , m = sc.nextInt();
           
         String[] roll = {"1/6" , "1/3" , "1/2" , "2/3" , "5/6" , "1/1"};
         
            System.out.println(roll[6 - Math.max(n , m)]);
           
      }
}


 