#include <bits/stdc++.h>
using namespace std;
int Nr;
string Str;
unordered_map<char, int> Frq;
int main() {
  cin >> Str;
  for (auto ch : Str) Frq[ch]++;
  for (auto itr : Frq)
    if (itr.second % 2 == 1) Nr++;
  if (Nr % 2 == 0 && Nr != 0)
    cout << "Second";
  else
    cout << "First";
  return 0;
}
