#include <bits/stdc++.h>
using namespace std;
int n, m, k;
string x, y;
int main() {
  cin >> m >> n;
  k = n;
  if ((n == 0 && m > 1) || (9 * m < n)) {
    cout << "-1 -1\n";
    return 0;
  }
  if (n == 0 && m == 1) {
    cout << "0 0\n";
    return 0;
  }
  y = "";
  for (int i = 0; i < m; i++) {
    if (n >= 9) {
      y += '9';
      n -= 9;
    } else {
      y += (n + '0');
      n = 0;
    }
  }
  x = "";
  n = k;
  for (int i = 0; i < m; i++) {
    if (n > 9) {
      x += '9';
      n -= 9;
    } else {
      if (i == (m - 1)) {
        if (n > 0) {
          x += (n + '0');
        } else {
          x += '1';
        }
      } else {
        if (n) n--;
        x += (n + '0');
        n = 0;
      }
    }
  }
  reverse(x.begin(), x.end());
  cout << x << " " << y << "\n";
}
