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 DieRoll {
	public static void main(String args[]){
		Scanner key = new Scanner(System.in);
		int y = key.nextInt();
		int w = key.nextInt();
		int take;
		if(y>w){
			take = y;
			
		}
		else take = w;
		
		int c = 0;
		while(take<=6){
			c++;
			take++;
		}
		if(c==1){
			System.out.println("1/6");
			
		}
		else if(c==2){
			System.out.println("1/3");
		}
		else if(c==3){
			System.out.println("1/2");
		}
		else if(c==4){
			System.out.println("2/3");
		}
		else if(c==5){
			System.out.println("5/6");
		}
		else if(c==6){
			System.out.println("1/1");
		}
		else System.out.println("0/1");
		
		}
	}


