#include <bits/stdc++.h>
using namespace std;
template <typename T>
T gcd(T a, T b) {
  if (b == 0) return a;
  return gcd(b, a % b);
}
template <typename T>
T lcm(T a, T b) {
  return a * (b / gcd(a, b));
}
void err(istream_iterator<string> it) {}
template <typename T, typename... Args>
void err(istream_iterator<string> it, T a, Args... args) {
  cout << *it << " = " << a << "\n";
  err(++it, args...);
}
void file_i_o() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
}
int main() {
  file_i_o();
  clock_t begin = clock();
  string S;
  cin >> S;
  unordered_map<char, int> freq;
  for (int i = (0); i <= (S.length() - 1); i++) {
    freq[S[i]]++;
  }
  int ec = 0, oc = 0;
  for (auto itr : freq) {
    if ((itr.second) % 2 == 0)
      ec++;
    else
      oc++;
  }
  string ans;
  if (oc == 0 or oc % 2 == 1) {
    ans = "First";
  } else {
    ans = "Second";
  }
  cout << ans << "\n";
}
