#include <bits/stdc++.h>
using namespace std;
const long long oo = 2 * 10e9;
int main() {
  string s;
  cin >> s;
  map<char, int> make_pair;
  for (char c : s) make_pair[c]++;
  int k = 0;
  for (auto p : make_pair) {
    if (p.second % 2 == 1) k++;
  }
  if (k <= 1 || k % 2 == 1) {
    cout << "First";
  } else {
    cout << "Second";
  }
  return 0;
}
