#include <bits/stdc++.h>

#define rep(i, a, b) for (int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
#define debug std::cout << "hmm" << std::endl;
typedef long long ll;
typedef std::pair<int, int> pii;
typedef std::pair<ll, ll> pll;
typedef std::vector<int> vi;
typedef std::vector<ll> vl;

template <typename T>
void print(T t)
{
    std::cout << t << ' ';
}
template <typename T1, typename T2>
void print(std::pair<T1, T2> t)
{
    std::cout << '{' << t.first << ' ' << t.second << '}';
}
template <typename T>
void print(std::vector<T> t)
{
    for (auto a : t)
        print(a);
    std::cout << std::endl;
}

main()
{
    std::cin.tie(0)->sync_with_stdio(0);
    std::cin.exceptions(std::cin.failbit);

    int Z = 1;
    //std::cin >> Z;
    while (Z--)
    {
        std::vector<char> R{'a', 'q', 'n', 'o'};
        int n;
        std::cin >> n;
        vi V(n, 3);
        std::string S;
        std::cin >> S;
        int W = 0;
        for (auto a : S)
            W += int(a - '0');
        if (W < 3 * n || W > 6 * n)
            std::cout << "NIE";
        else
        {
            W -= 3 * n;
            int i = 0;
            while (W > 0)
            {
                V[i] += std::min(3, W);
                W -= 3;
                i++;
            }
            for (auto a : V)
                std::cout << R[a - 3];
        }
    }
}