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 A9 {
	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		int A,B,max;
		int W = input.nextInt();
		int Y = input.nextInt();
		if(W>Y)
			max=W;
		else
			max=Y;
		max=7-max;
		if (max==6)
			{
			A=1;B=1;
			}
			else if (max%2==0)
			{
			A=max/2;B=3;
			}
			else if (max%3==0)
			{
				A=max/3;B=2;
			}
			else
			{
				A=max;B=6;
			}
		System.out.println(A +"/"+B);
}
}
