#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, ans = 0, ans1 = 0, ans2 = 0, tar;
  cin >> n;
  tar = n / 3;
  string s;
  cin >> s;
  for (int i = 0; i < n; i++) {
    int val = s[i] - '0';
    if (val == 0)
      ans++;
    else if (val == 1)
      ans1++;
    else
      ans2++;
  }
  for (int i = 0; tar > ans; i++) {
    if (i == n) break;
    if (s[i] == '1' and tar < ans1) {
      s[i] = '0';
      ans++;
      ans1--;
      continue;
    }
    if (s[i] == '2' and tar < ans2) {
      s[i] = '0';
      ans++;
      ans2--;
      continue;
    }
  }
  for (int i = n - 1; (tar < ans1) and ans2 < tar; i--) {
    if (i < 0) break;
    if (s[i] == '1') {
      s[i] = '2';
      ans2++;
      ans1--;
    }
  }
  for (int i = n - 1; (tar < ans) and ans2 < tar; i--) {
    if (i < 0) break;
    if (s[i] == '0') {
      s[i] = '2';
      ans2++;
      ans--;
    }
  }
  for (int i = 0; (tar < ans2) and ans1 < tar; i++) {
    if (i == n) break;
    if (s[i] == '2') {
      s[i] = '1';
      ans1++;
      ans2--;
    }
  }
  for (int i = n - 1; (tar < ans) and ans1 < tar; i--) {
    if (i < 0) break;
    if (s[i] == '0') {
      s[i] = '1';
      ans1++;
      ans--;
    }
  }
  cout << s << endl;
}
