#include <bits/stdc++.h>
using namespace std;
int main () {
	int N;
	cin >> N;
	string s;
	cin >> s;
	string a[2];
	for (int i = 0; i < N; i ++) {
		a[i & 1] += s[i];
	}
	cout << a[0] << " " << a[1] << endl;
}