#include <bits/stdc++.h>
using namespace std;
void file() {}
using lli = long long int;
using pii = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vi>;
void solve() {
  string s;
  cin >> s;
  string res = "";
  int z = 0, ones = 0, two = s.size();
  for (int i = 0; i < s.size(); i++) {
    int x = s[i] - '0';
    if (x == 1) ones++;
    if (x == 2 && two == s.size()) two = i;
    if (x == 0 && two == s.size()) z++;
  }
  res += string(z, '0');
  res += string(ones, '1');
  for (int i = two; i < s.size(); i++) {
    int x = s[i] - '0';
    if (x == 1) continue;
    res += s[i];
  }
  cout << res << endl;
}
int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  solve();
}
