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.*;

public class dieroll{
  public static int factor(int a,int b){
    if(a==b){
      return a;
    }
    else if(a<b){
      return factor(b,a);
    }
    else{
      if(a%b==0){
        return b;
      }
      else{
        return factor(b, a%b);
      }
    }
  }

  public static void main(String[] args) throws IOException{
      BufferedReader scan= new BufferedReader(new InputStreamReader(System.in));
      String[] str= new String[2];
      str= scan.readLine().split(" ");
      int chance= 7- Math.max(Integer.parseInt(str[0]), Integer.parseInt(str[1]));
      System.out.println(chance/factor(chance,6)+"/"+ 6/factor(chance,6));
  }
}
