#include <iostream>

using namespace std;

void res(int n) {
    if (n > 0) {
        res(n / 10);
        cout << n % 10;
    }
    return;
}

int main() {
    int a, b;
    cin >> a >> b;
    for (int i = a; i <= b; ++i) {
        res(i);
        cout << " ";
    }
    return 0;
}