#include <iostream>
#include <cstdio>
#include <cmath>
#include <memory.h>
#include <ctype.h>
#include <vector>
#include <stack>
#include <queue>
#include <map>
#include <algorithm>

using namespace std;

int n;

int sum(string s)
{
  int r = 0;
  for (int i = 0; i < n; i++)
    if (s[i] == '1')
      r += i+1;
  return r;
}

int main()
{
#ifndef ONLINE_JUDGE
  freopen("input.txt", "rt", stdin);
  freopen("output.txt", "wt", stdout);
#endif

  cin >> n;
  string s, t;

  int k;

  while (getline(cin, t))
  {
    s = "";
    for (int i = 0; i < t.length(); i++)
      if (t[i] == '0' || t[i] == '1')
        s += t[i];

    k = s.length();

    if (k == 0)
      continue;

    if (k == n)
    {
      if (sum(s) % (n+1) == 0)
        cout << s << "\n";
      else
        for (int i = n-1; i >= 0; i--)
          if (s[i] == '1')
          {
            s[i] = '0';
            if (sum(s) % (n+1) == 0)
            {
              cout << s << "\n";
              break;
            }
            s[i] = '1';
          }
    } else
      if (k > n)
      {
        for (int i = 0; i < k; i++)
        {
          t = s.substr(0,i) + s.substr(i+1);
          if (sum(t) % (n+1) == 0)
          {
            cout << t << "\n";
            break;
          }
        }
      } else
      {
        for (int i = 0; i <= k; i++)
          for (char c = '0'; c <= '1'; c++)
          {
            t = s.substr(0,i) + c + s.substr(i);
            if (sum(t) % (n+1) == 0)
            {
              cout << t << "\n";
              break;
            }
          }
      }

    if (cin.eof())
      break;
  }

  return 0;
}