#include <bits/stdc++.h>
using namespace std;
void solve() {
  string s;
  cin >> s;
  map<char, long long> mp;
  for (long long i = 0; i < s.size(); i++) mp[s[i]]++;
  long long c = 0;
  for (auto it = mp.begin(); it != mp.end(); it++) {
    if (it->second & 1) c++;
  }
  if (c <= 1)
    cout << "First";
  else {
    if (c % 2 == 0)
      cout << "Second";
    else
      cout << "First";
  }
}
signed main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  solve();
  return 0;
}
