#include <bits/stdc++.h>
using namespace std;
string rev(string str) {
  string res = "";
  for (int i = str.length() - 1; i > -1; i--) {
    res += str[i];
  }
  return res;
}
int main() {
  int m, s;
  cin >> m >> s;
  string str = "", rts = "";
  if (s == 0 && m == 1) {
    cout << "0 0" << endl;
    return 0;
  }
  if (s == 0 || s > m * 9) {
    cout << "-1 -1" << endl;
    return 0;
  }
  for (int i = 0; i < m; i++) {
    str += "0";
  }
  rts = str;
  for (int i = m - 1; i > -1 && s > 0; i--) {
    if (s > 9) {
      str[i] = '9';
      rts[m - i - 1] = '9';
      s -= 9;
      continue;
    }
    if (i > 0) {
      str[0] += 1;
      rts[m - i - 1] += 1;
      s--;
    }
    str[i] += s;
    rts[m - i - 1] += s;
    s = 0;
  }
  cout << str << " " << rts << endl;
  return 0;
}
