#include <bits/stdc++.h>
using namespace std;
int arr[27];
int main() {
  int a = 2;
  string s;
  cin >> s;
  for (int i = 0; i < s.size(); i++) arr[s[i] - 'a']++;
  for (int i = 0; i < 26; i++) {
    if (arr[i] % 2) a++;
  }
  if (a % 2 || a == 2)
    cout << "First";
  else
    cout << "Second";
  return 0;
}
