#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main() {
	string a = "Hello world";
        vector<unsigned char> v(a.begin(), a.end());
        for (int i= 0 ;i<  v.size(); ++i) {
           cout << v[i] << endl;
        }
	string s(v.begin(), v.end());
        cout << s << endl;
	return 0;
}