#include <bits/stdc++.h>
using namespace std;
int main() {
  string a = "First";
  string b = "Second";
  string c;
  cin >> c;
  int alpha[26] = {0};
  for (int i = 0; i < c.length(); i++) {
    alpha[c[i] - 'a']++;
  }
  int k = 0;
  for (int i = 0; i < 26; i++) {
    if (alpha[i] % 2 != 0) k++;
  }
  if (k == 0 || k == 1)
    cout << a << endl;
  else if (k % 2 == 0)
    cout << b << endl;
  else
    cout << a << endl;
}
