#include <bits/stdc++.h>
using namespace std;
void small(long long m, long long s) {
  vector<long long> v;
  long long p = (s % 9 == 0) ? s / 9 - 1 : s / 9;
  for (long long i = 0; i < p; i++) {
    v.push_back(9);
    s -= 9;
  }
  if (m - p == 1) {
    v.push_back(s);
  }
  if (m - p >= 2) {
    s--;
    v.push_back(s);
    for (long long i = 0; i < m - p - 2; i++) {
      v.push_back(0);
    }
    v.push_back(1);
  }
  for (long long i = v.size() - 1; i >= 0; i--) {
    cout << v[i];
  }
  cout << " ";
}
void great(long long m, long long s) {
  vector<long long> v;
  long long k = s / 9;
  for (long long i = 0; i < k; i++) {
    v.push_back(9);
    s -= 9;
  }
  if (s > 0) {
    v.push_back(s);
    k++;
  }
  for (long long i = 0; i < m - k; i++) {
    v.push_back(0);
  }
  for (long long i = 0; i < v.size(); i++) {
    cout << v[i];
  }
}
int main() {
  long long m, s, h;
  string k;
  vector<int> v;
  cin >> m >> s;
  if (s % 9 == 0) {
    long long t = 0;
    if (m == 1 && s == 0) {
      cout << "0 "
           << "0";
      t = 1;
    }
    if (t == 0) {
      if (m < s / 9 || s == 0) {
        cout << "-1 "
             << "-1";
      } else {
        small(m, s);
        great(m, s);
      }
    }
  } else if (s % 9 != 0) {
    long long t = 0;
    if (m == 1 && s == 0) {
      cout << "0 "
           << "0";
      t = 1;
    }
    if (t == 0) {
      if (m < s / 9 + 1 || s == 0) {
        cout << "-1 "
             << "-1";
      } else {
        small(m, s);
        great(m, s);
      }
    }
  }
  return 0;
}
