#include <bits/stdc++.h>
using namespace std;
void solve() {
  long long n, m;
  cin >> n >> m;
  if (m == 0 && n == 1) {
    cout << "0 0";
  } else if (m > 9 * n || m == 0) {
    cout << "-1 -1";
    return;
  } else {
    long long a[n], b[n];
    long long sum = m, maxi = 9;
    for (long long i = 0; i < n; ++i) {
      a[i] = min(maxi, sum);
      sum -= a[i];
    }
    sum = m;
    for (int i = n - 1; i >= 1; --i) {
      b[i] = min(maxi, sum - 1);
      sum -= b[i];
    }
    b[0] = sum;
    for (int i = 0; i < n; ++i) {
      cout << b[i];
    }
    cout << " ";
    for (int i = 0; i < n; ++i) {
      cout << a[i];
    }
    cout << " ";
  }
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  { solve(); }
  return 0;
}
