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.io.*;
import java.util.*;
public class BrosokKubika {
	StreamTokenizer st = null;
	public static void main(String [] args) throws Exception {
		new BrosokKubika().solve();
	}
	private int nextInt() throws Exception{
		st.nextToken();
		return (int) st.nval;
	}
	public void solve() throws Exception {
		st = new StreamTokenizer(System.in);
		int x = nextInt();
		int y = nextInt();
		
		int ans = 6 - Math.max(x, y);
		System.out.println(1 + "/" + ans);
	}
}
