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.*; 
public class DieRoll {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
Scanner scan = new Scanner (System.in); 
int a = scan.nextInt(); 
int b = scan.nextInt(); 
int count = 0 ; 
for (int i = 6 ; i > 0 ; i --){ 
	if (i >= Math.max(a, b)){
		count++; 
	}
}
if (count == 0){ 
	System.out.println("0/1");
}else if (count == 6){
	System.out.println("1/1");
}else if (count == 3){ 
	System.out.println("1/2");
}else if (count == 2){ 
	System.out.println("1/3");
}else if (count == 4){ 
	System.out.println("2/3");
}else{ 
	System.out.println(count+"/6");
}
	}

}