#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, sum;
  cin >> n >> sum;
  if (n == 1 && sum == 0) {
    cout << "0 0";
    return 0;
  }
  if (sum < 1 || sum > 9 * n) {
    cout << "-1 -1";
    return 0;
  }
  vector<int> arr(n, 0);
  vector<int> a(n, 0);
  arr[0] = 1;
  int add = sum - 1;
  int j = n - 1;
  while (add >= 9) {
    arr[j] = 9;
    add = add - 9;
    j--;
  }
  arr[j] = arr[j] + add;
  for (int i = 0; i < n; i++) cout << arr[i];
  cout << " ";
  int i = 0;
  while (sum >= 9) {
    a[i] = 9;
    sum = sum - 9;
    i++;
  }
  a[i] = sum;
  for (int i = 0; i < n; i++) cout << a[i];
}
