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 Div2A;



import java.util.Scanner;

public class dieRoll {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		
int y = sc.nextInt();
int w = sc.nextInt();
int max = Math.max(y, w);
int prob = 6-max+1;
int frat = 6/prob;
if(frat==1 && prob != 6 && prob!=4) {
System.out.println(prob + "/" + 6);
}else if(prob == 4){
	System.out.println(2 + "/" + 3);
}else {
	System.out.println(1 + "/" + frat);
}
	}

}
