#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  cin >> s;
  map<int, int> m;
  for (int i = 0; i < s.size(); i++) {
    m[s[i] - 'a']++;
  }
  int c = 0;
  for (int i = 0; i < s.size(); i++) {
    if (m[i] % 2) c++;
  }
  if (c == 0)
    cout << "First" << endl;
  else if (c % 2)
    cout << "First" << endl;
  else
    cout << "Second" << endl;
}
