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.Scanner;


public class Main {

	public static void main(String[] args) {

		Scanner input = new Scanner(System.in);
		
		int yakkosRoll, wakkosRoll;
		
		yakkosRoll = input.nextInt();
		wakkosRoll = input.nextInt();
		
		int greatest = findGreatest(yakkosRoll, wakkosRoll);
		
		int num , denom;
		
		int dotsChance = 6 - greatest;
		
		if(dotsChance > 0 && dotsChance != 6)
		{
			num = dotsChance + 1;
			denom = 6;
		}
		else if(dotsChance == 6)
		{
			num = 1;
			denom = 1;
		}
		else
		{
			num = 0;
			denom = 1;
		}
		
		
		if(num % 2 == 0 && denom % 2 == 0)
		{
			num = num /2;
			denom = denom / 2;
		}
		if(num % 3 == 0 && denom % 3 == 0)
		{
			num = num / 3;
			denom = denom / 3;
		}
		
		System.out.println(num + "/" + denom);

	}

	public static int findGreatest(int a , int b)
	{
		
		if(a > b)
		{
			return a;
		}
		else
		{
			return b;
		}
	}
	
}