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#include <bits/stdc++.h>
using namespace std;
 
int main(int argc, char* argv[]) {
    ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
    int n, t = 0;
    string s, r;
    cin >> n >> s;
    for(auto& a: s)
		t += a - '0';
	if (n * 3 <= t && n * 6 >= t) {
		while (n) {
			cout << "peso"[t / n - 3];
			t -= t / n--;
		}
	}
	else
		cout << "NIE";
	cout << "\n";
    return 0;
}