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

int main() {
  string s;
  cin >> s;
  string sc = "", sn = "";
  vector<int> v(s.size());
  for (int i = 0; i < (int)s.size(); i++) {
    if (s[i] >= 'a' && s[i] <= 'z') {
      sc += s[i];
      v[i] = 1;
    } else {
      sn += s[i];
      v[i] = 0;
    }
  }
  reverse(sc.begin(), sc.end());
  int ic = 0, in = 0;
  for (int i = 0; i < (int)s.size(); i++) {
    if (v[i] == 1) {
      cout << sc[ic]; ic++;
    } else {
      cout << sn[in]; in++;
    }
  }
  return 0;
}