#include <bits/stdc++.h>
using namespace std;
void solve(string s) {
  map<char, int> m;
  for (int i = 0; i < s.length(); i++) {
    m[s[i]]++;
  }
  int k = 0;
  for (auto it = m.begin(); it != m.end(); it++) {
    if (((it->second) % 2) != 0) k++;
  }
  if (k == 0 || k == 1) {
    cout << "First";
    return;
  }
  if (k % 2 == 0) {
    cout << "Second";
    return;
  }
  cout << "First";
}
int main() {
  string s;
  cin >> s;
  solve(s);
}
