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#include <iostream>

int main()
{
    std::ios_base::sync_with_stdio(0);

    int n, z = 0, x;
    char c;

    std::cin >> n;
    for (int i = 1; i <= 8 * n; ++i) {
        std::cin >> c;
        if (c == '0') ++z;
    }

    if (z > 5 * n || z < 2 * n) {
        std:: cout << "NIE";
    } else {
        while (n > 0) {
            x = z - 2 * n + 2;
            if (x > 5) x = 5;
            c = x < 4 ? (x == 2 ? 'o' : 'n') : (x == 4 ? 'l' : 'p');
            std::cout << c;
            --n;
            z -= x;
        }
    }
    std::cout << std::endl;
    return 0;
}