#include <bits/stdc++.h>
using namespace std;
int n, s, a[11111];
string s1;
int main() {
  cin >> n >> s;
  if ((n > 1 && s == 0) || 9 * n < s) {
    cout << -1 << ' ' << -1;
    return 0;
  }
  int i = 0, ss = s;
  while (ss >= 9) {
    a[i] = 9;
    s1 += '9';
    ss -= 9;
    i++;
  }
  a[i] = ss;
  if (ss || i != n) {
    s1 += char(ss + '0');
    i++;
  }
  for (int j = i; j < n; j++) {
    s1 += '0';
    a[j] = 0;
  }
  sort(a, a + n);
  if (!a[0]) {
    int j = n - 1;
    while (a[j] > 0) {
      j--;
    }
    if (a[j + 1]) {
      a[0] = 1;
      a[j + 1]--;
    }
  }
  for (int i = 0; i < n; i++) cout << a[i];
  cout << ' ' << s1;
  cout << endl;
}
