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 Runner{

     public static void main(String []args){
       Scanner s = new Scanner(System.in);
       
		int y = s.nextInt();
		int w = s.nextInt();
	   
		int cur = 0;
		
		if(y>w){
			cur = y;
		}else{
			cur = w;
		}
		
		int prob = (6-cur+1);
		

		if (prob == 1){ 
			System.out.println("1/6"); //1/6
		}else if (prob == 2){
			System.out.println("1/3"); //2/6
		}else if (prob == 3){
			System.out.println("1/2"); //3/6
		}else if (prob == 4){
			System.out.println("2/3"); //4/6
		}else if (prob == 5){
			System.out.println("5/6"); //5/6
		}else if (prob == 6){
			System.out.println("1/1"); //6/6
		}
		
     }
}


