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#include <bits/stdc++.h>
using namespace std;

int n;
int zeros = 0;
int ones = 0;
string s;
string ans = "";

int difference() {
    return abs(zeros - ones);
}

int main() {

    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);

    cin >> n >> s;

    for (auto c : s) {
        c == '0' ? zeros++ : ones++;
    }

    if (3 * zeros < ones || 3 * zeros > 5 * ones) {
        cout << "NIE";
        return 0;
    }

    while (zeros > ones) {
        ans += 'p';
        zeros -= 5;
        ones -= 3;
    }

    while (zeros < ones) {
        if (difference() >= 4) {
            ans += 'o';
            zeros -= 2;
            ones -= 6;
        } else {
            ans += 'n';
            zeros -= 3;
            ones -= 5;
        }
    }

    while (zeros && ones) {
        ans += 'q';
        zeros -= 4;
        ones -= 4;
    }

    cout << ans;
    return 0;
}