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#include<bits/stdc++.h>
#define ll long long
#define pii pair<int, int>
#define st first
#define nd second
#define turbo ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define pb push_back
#define vi vector<int>
#define vvi vector<vi>
#define qi queue<int>
#define ld long double

using namespace std;

/*---------------------------------------------------------///CODE///---------------------------------------------------------*/

bool ok (int licz, int n)
{
    if(licz < 3*n || licz > 6*n)
        return false;
    return true;
}
int main()
{
    turbo

    int n; cin >> n;
    string s; cin >> s; 
    int licz = 0;

    for(int i = 0; i < s.size(); i++)
        if(s[i] == '1') licz ++;

    if(!ok(licz, n))
    {
        cout << "NIE";
        return 0;
    }

    int i = 6;

    while(licz > 0)
    {
        if(!ok(licz - i, n - 1))
        {
            i --;
            continue;
        }

        if(i == 6) cout << 'w';
        if(i == 5) cout << 'm';
        if(i == 4) cout << 'e';
        if(i == 3) cout << 'a';

        licz -= i;
        n --;
    }
    
    return 0;
}