#include <bits/stdc++.h>
using namespace std;
const int MAX = 500010;
int n, m;
int seg[MAX];
int vis[MAX];
int p[MAX];
int in[MAX], out[MAX];
int aux = 0;
vector<int> adj[MAX];
set<int> s;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int x, s;
  cin >> x >> s;
  if (!s) {
    if (x == 1)
      cout << "0 0\n";
    else
      cout << "-1 -1\n";
    return 0;
  }
  if (9 * x < s) {
    cout << "-1 -1\n";
    return 0;
  }
  string sb;
  int s1 = s;
  for (int i = 1; i <= x; i++) {
    if (s > 9)
      sb += '9', s -= 9;
    else if (i == x)
      sb += '0' + s;
    else if (s > 1)
      sb += '0' + (s - 1), s = 1;
    else
      sb += '0';
  }
  reverse(sb.begin(), sb.end());
  cout << sb << "\n";
  string st;
  for (int i = 1; i <= x; i++) {
    if (s1 >= 9)
      st += '9', s1 -= 9;
    else
      st += s1 + '0', s1 = 0;
  }
  cout << st << "\n";
}
