#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int m, s;
  cin >> m >> s;
  int small[110] = {0};
  small[1] = 1;
  int x = s - 1;
  int flag = 1;
  for (int i = m; i >= 1; i--) {
    if (i == 1 && x >= 9) {
      flag = 0;
      break;
    }
    if (x >= 9) {
      small[i] += 9;
      x -= 9;
    } else {
      small[i] += x;
      break;
    }
  }
  int large[110] = {0};
  x = s;
  for (int i = 1; i <= m; i++) {
    if (x > 9 && i == m) {
      flag = 0;
      break;
    }
    if (x >= 9) {
      large[i] += 9;
      x -= 9;
    } else {
      large[i] += x;
      break;
    }
  }
  if (m >= 2 && s == 0) flag = 0;
  if (flag) {
    for (int i = 1; i <= m; i++) cout << small[i];
    cout << ' ';
    for (int i = 1; i <= m; i++) cout << large[i];
    cout << endl;
  } else
    cout << -1 << ' ' << -1 << endl;
  return 0;
}
