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 BrosokKubika{
  public static void main (String[]args){
    Scanner input = new Scanner (System.in);
    int Y = input.nextInt();
    int W = input.nextInt();

    int maks = Y;
    if (W > Y){
      maks = W;
    }

    int A = 6 - maks + 1;
    int A1 = A;
    int B1 = 6;
    if (A <= 0){
      System.out.print("0/0");
    }
    else if (A == 6){
      System.out.print("1/1");
    }
    else{
      for (int i = 2; i <= 6; i++){
        if (A%i == 0){
          A1 = A / i;
          B1 = 6 / i;
        }
      }
      System.out.print(A1 + "/" + B1);
    }
  }
}
