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.ArrayList;
import java.util.Collections;
import java.util.Scanner;
import java.util.TreeSet;
import java.util.Vector;

public class Main {

	public static void main(String[] args) {

		Scanner read = new Scanner(System.in);

		int y = read.nextInt();
		int w = read.nextInt();

		int max = Math.max(y,w);

		switch(6 - (max - 1)){
			case 1 : System.out.println("1/6");break;
			case 2 : System.out.println("1/3");break;
			case 3 : System.out.println("1/2");break;
			case 4 : System.out.println("2/3");break;
			case 5 : System.out.println("5/6");break;
			case 6 : System.out.println("1/1");break;
		}
	} 
}