#include <bits/stdc++.h>
using namespace std;
int freq[3];
int main() {
  ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  int n;
  cin >> n;
  string s;
  cin >> s;
  for (int i = 0; i < n; i++) {
    freq[s[i] - '0']++;
  }
  for (int i = n - 1; i >= 0; i--) {
    if (freq[0] <= n / 3) {
      break;
    }
    if (s[i] == '0') {
      if (freq[2] < n / 3) {
        freq[2]++;
        s[i] = '2';
        freq[0]--;
      } else {
        freq[1]++;
        s[i] = '1';
        freq[0]--;
      }
    }
  }
  for (int i = 0; i < n; i++) {
    if (freq[1] <= n / 3) break;
    if (s[i] == '1') {
      if (freq[0] < n / 3) {
        freq[0]++;
        freq[1]--;
        s[i] = '0';
      }
    }
  }
  for (int i = n - 1; i >= 0; i--) {
    if (freq[1] <= n / 3) break;
    if (s[i] == '1') {
      if (freq[2] < n / 3) {
        freq[2]++;
        freq[1]--;
        s[i] = '2';
      }
    }
  }
  for (int i = 0; i < n; i++) {
    if (freq[2] <= n / 3) break;
    if (s[i] == '2') {
      if (freq[0] < n / 3) {
        freq[0]++;
        freq[2]--;
        s[i] = '0';
      } else {
        freq[1]++;
        freq[2]--;
        s[i] = '1';
      }
    }
  }
  cout << s;
  return 0;
}
