#include <iostream>
using namespace std;

int main() {
    int n;
    cin >> n;

    if (n < 0 || n > 10) {
        cout << "Invalid input" << endl;
        return 0;
    }

    int arr[10];
    bool invalid = false;

    for (int i = 0; i < n; i++) {
        cin >> arr[i];
        if (arr[i] < 0) {
            invalid = true;
        }
    }

    if (invalid) {
        cout << "Invalid input" << endl;
        return 0;
    }

    // Print original array
    for (int i = 0; i < n; i++) {
        cout << arr[i];
        if (i < n - 1) cout << " ";
    }
    cout << endl;

    // Print reversed array
    for (int i = n - 1; i >= 0; i--) {
        cout << arr[i];
        if (i > 0) cout << " ";
    }
    cout << endl;

    return 0;
}