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.*;
public class Ex19 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner console = new Scanner (System.in);
		int f = console.nextInt();
		int g = console.nextInt();
		int s = Math.max(g,f);
		switch (s) {
		case 1 :
			System.out.println("1/1");
			break;
		case 2 :
			System.out.println("5/6");
			break;
		case 3 :
			System.out.println("2/3");
			break;
		case 4 :
			System.out.println("1/2");
			break;
		case 5 :
			System.out.println("1/3");
			break;
		case 6 :
			System.out.println("0/1");
			break;
		}
		
			
	}

}
