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.*;
import java.util.TreeSet;
import java.lang.*;
import java.text.DecimalFormat;
public class ab{
	public static void main(String args[]){
		Scanner in=new Scanner(System.in);
		int y=in.nextInt(),w=in.nextInt();
		if(w>y)
			y=w;
		y=6-y+1;
		String z;
		if(y==6)
			z="1/1";
		else if(y==5)
			z="5/6";
		else if(y==4)
			z="2/3";
		else if(y==3)
			z="1/2";
		else if(y==2)
			z="1/3";
		else
			z="1/6";
		System.out.println(z);
		
	}
}