#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll m, s, a[101], i, z;
int main ()
{
    cin >> m >> s;
    if (m>s || s>m*9){
        cout << "-1 -1" << endl;
        return 0;
    }
    z=s/m;
    for (i=0; i<m-1; i++){
        cout << z;
        a[i]=z;
        s-=z;
    }
    a[i]=s;
    cout << a[i] << " ";
    for (i=m-1; i>=0; i--)
        cout << a[i];
    cout << endl;
    return 0;
}