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

// http://codeforces.com/problemset/problem/9/A
import java.util.*;

public class dieroll {
	
	public static void main(String[] args) {
		
		Scanner stdin = new Scanner(System.in);
		int y = stdin.nextInt();
		int w = stdin.nextInt();
		int max = Math.max(y, w);
		int d = 6-max;
		int total = 6;
		if (d+1 == 3) {
			d = (d+1)/3;
			total = total/3;
		} else if (d+1 == 4) {
			d = (d+1)/2;
			total = total/2;
		} else if (d+1 == 6) {
			d = 1;
			total = total/6;
		} else if (d+1 == 2) {
			d = (d+1)/2;
			total = total/2;
		} 
		System.out.println(d+"/"+total);
		stdin.close();
	}

}
