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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;


public class Main {

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer str=new StringTokenizer(br.readLine());
        int y=Integer.parseInt(str.nextToken()),w=Integer.parseInt(str.nextToken());
        int x;
        int z=6;
        if(y>w) x=6-y+1;
        else x=6-w+1;

        if(x%2==0){
            while(x%2==0 && z%2==0){
                x=x/2;
                z=z/2;
            }
        }
        else{
            while(x%3==0 && z%3==0){
                x=x/3;
                z=z/3;
            }
        }
        if(x!=z) System.out.println(x+"/"+z);
        else System.out.println("1/1");

    }
}
