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 Runner {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		int fr = sc.nextInt();
		int sr = sc.nextInt();
		
		int larger = largerNum(fr, sr);
		
		int denominator = 6 - larger+1;
		
		switch(denominator) {
			case 0:
				System.out.println("0/1");
				break;
			case 2:
				System.out.println("1/3");
				break;
			case 3:
				System.out.println("1/2");
				break;
			case 4:
				System.out.println("2/3");
				break;
			case 6:
				System.out.println("1/1");
				break;
			default:
				System.out.println("1/" + denominator);
				break;
		}
	}
	
	private static int largerNum(int first, int second) {
		if(first >= second) return first;
		return second;
	}

	private static char[] stringArrayToCharArray(String[] strs) {
		char[] charArr = new char[strs.length];
		
		for(int i = 0; i < strs.length; i++) {
			charArr[i] = strs[i].charAt(0);
		}
		
		return charArr;	
	}


}