codesforces1009B.cpp

#include <bits/stdc++.h>
using namespace std;

int main() {
  string s;
  cin >> s;
  bool found = true;
  int two = -1;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == '2') {
      two = i;
      break;
    }
  }
  string ans = "";
  if (two != -1) {
    int zeros = 0, onesbefore = 0;
    for (int i = 0; i < two; i++) {
      if (s[i] == '0') {
        zeros++;
      } else {
        onesbefore++;
      }
    }
    while (zeros--) {
      ans += string(1, '0');
    }
    while (onesbefore--) {
      ans += string(1, '1');
    }
    int onesafter = 0;
    for (int i = 0; i < s.size(); i++) {
      if (i > two and s[i] == '1') {
        onesafter++;
      }
    }
    while (onesafter--) {
      ans += string(1, '1');
    }
    ans += string(1, '2');
    for (int i = two + 1; i < s.size(); i++) {
      if (s[i] != '1') {
        ans += string(1, s[i]);
      }
    }
  } else {
    ans = "";
    int zeros = 0, ones = 0;
    for (int i = 0; i < s.size(); i++) {
      if (s[i] == '0') {
        zeros++;
      } else {
        ones++;
      }
    }
    while (zeros--) {
      ans += string(1, '0');
    }
    while (ones--) {
      ans += string(1, '1');
    }
  }
  cout << ans << endl;
  return 0;
}