1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
#include <bits/stdc++.h>
 
#define st first
#define nd second
#define pb push_back
#define BOOST ios_base::sync_with_stdio(0); cout.tie(0); cin.tie(0);
#define PI 3.14159265359
 
using namespace std;
 
typedef long long ll;
constexpr ll MOD = 1000000007, sup = 29;
constexpr ll MOD_1 = 1234567891, sup_1 = 1009;
constexpr ll MOD_2 = 1000000009, sup_2 = 107;
constexpr int MXN = 800000+10, CZAPA = (1<<19)/*, INF = 1000000000*/;
constexpr ll INF = 1000000000000000000;

int main(){
	BOOST;
	
	int n;
	string s;
	cin>> n >> s;
	int cnt = 0;
	for(char i : s){
		if(i == '1')
			cnt++;
	}
	if(cnt < 3*n || cnt > 6*n){
		cout<< "NIE\n";
		return 0;
	}
	cnt -= 3*n;
	while(n--){
		if(cnt >= 3){
			cnt -= 3;
			cout<< 'o';
		}
		else if(cnt == 2){
			cnt -= 2;
			cout<< 'g';
		}
		else if(cnt == 1){
			cnt -= 1;
			cout<< 'c';
		}
		else{
			cout<< 'a';
		}
	}



	return 0;
}