#include <bits/stdc++.h>
using namespace std;
int main() {
  int x, y;
  if (1 <= x <= 20 && 1 <= y <= 20) {
    cout << "enter the first number = ";
    cin >> x;
    cout << "enter the second number = ";
    cin >> y;
    cout << "The result = " << x * y;
  } else
    cout << "-1";
}
