#include <bits/stdc++.h>
using namespace std;
int main() {
  string a;
  cin >> a;
  int c = 0;
  vector<char> h(256);
  for (int i = 0; i < a.length(); i++) h[a[i]]++;
  for (int i = 0; i < 256; i++)
    if (h[i] % 2 == 1) c++;
  if (c == 1 || c == 0) {
    cout << "First" << endl;
    return 0;
  }
  c--;
  if (c & 1)
    cout << "Second" << endl;
  else if ((c & 1) == 0)
    cout << "First" << endl;
}
