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.DataInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.*;
public class A {

	 static Scanner scan=new Scanner(System.in);
	  
	public static void main(String[] args) throws IOException {
	double a=scan.nextInt(),b=scan.nextInt();
	double max=Math.max(a, b);
	max=(6-max)+1;
	if(max/6==0) {
		System.out.println("0/1");
		
	}
	else if(max/6==1) {
		System.out.println("1/1");
	}
	else {
		System.out.println((int)max+"/"+6);
		
	}
}}
