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.*;
import java.lang.*;
import java.io.*;

public class pb2
{
	public static void main (String[] args)
	{
		Scanner in = new Scanner(System.in);

		int y,w;
		y = in.nextInt();
		w = in.nextInt();
		int p;
		if(y>w)
			p = 7-y;
		else
			p = 7-w;

		if(p == 0)
			System.out.println(0 + "/" + 1);
		else if(p == 1)
			System.out.println(1 + "/" + 6);
		else if(p == 2)
			System.out.println(1 + "/" + 3);
		else if(p == 3)
			System.out.println(1 + "/" + 2);
		else if(p == 4)
			System.out.println(2 + "/" + 3);
		else if(p == 5)
			System.out.println(5 + "/" + 6);
		else if(p == 6)
			System.out.println(1 + "/" + 1);

	}
}