#include <bits/stdc++.h>
using namespace std;
int a[301], b[301];
int main() {
  int n, m, i, j, k, y, t;
  string str;
  cin >> n >> m;
  if (m == 0 && n == 1) {
    cout << "0 0";
    return 0;
  }
  if (m == 0 || n * 9 < m) {
    cout << "-1 -1";
    return 0;
  }
  t = m;
  for (i = 1; i <= n; i++) {
    b[i] = min(9, t);
    t -= b[i];
  }
  t = m - 1;
  for (i = n; i; i--) {
    a[i] = min(9, t);
    t -= a[i];
  }
  a[1]++;
  for (i = 1; i <= n; i++) cout << a[i];
  cout << ' ';
  for (i = 1; i <= n; i++) cout << b[i];
  return 0;
}
