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

/* package whatever; // don't place package name! */

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

/* Name of the class has to be "Main" only if the class is public. */
public class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
	Scanner sc = new Scanner(System.in);
	int y = sc.nextInt(), w = sc.nextInt();
	int Probability = 6 - Math.max(y,w) +1;
	if(Probability == 0){
		System.out.println("0/1");
	}
	else{
		if(Probability == 1){
		System.out.println("1/1");
	}
	else{
		if(6 % Probability == 0){
		System.out.println("1" + "/" +(6 / Probability));
		}
		else{
		if(Probability == 6){
		System.out.println(6 + "/" + 6);	
		}
		else{
		System.out.println(Probability + "/" + 6);	
		}
		}
	}
	}
	}
}