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 test {
	public static void main(String[] args) {
		//Map<String, Integer> Map1 = new HashMap<String, Integer>();
		//Set<String> hash_Set = new HashSet<String>(); 
		Scanner keyboard = new Scanner(System.in);
		//Set<Integer> a = new HashSet<Integer>(); 
        //a.addAll(Arrays.asList(new Integer[] {1, 3, 2, 4, 8, 9, 0})); 
		int YakkoPoint = keyboard.nextInt();
		int WakkoPoint = keyboard.nextInt();
		int max = Math.max(YakkoPoint, WakkoPoint);
		int number = 6 - max ;
		if(number==0) {
			System.out.println("0/1");
		}
		else if (number==1) {
			System.out.println(1+"/"+6);
		}
		else if (number==2) {
			System.out.println(1+"/"+3);
		}
		else if (number==3) {
			System.out.println(1+"/"+2);
		}
		else if (number==4) {
			System.out.println(2+"/"+3);
		}
		else if (number==5) {
			System.out.println(5+"/"+6);
		}
		else if (number==6) {
			System.out.println("1/1");
		}
	}
}