#include <bits/stdc++.h>
using namespace std;
void solve() {
  string s;
  cin >> s;
  int arr[26] = {};
  int n = s.length();
  int count = 0;
  for (int i = 0; i < n; i++) {
    arr[s[i] - 'a']++;
    if (arr[s[i] - 'a'] == 2) {
      arr[s[i] - 'a'] = 0;
      count--;
    } else
      count++;
  }
  if (count == 0 || count == 1) {
    cout << "First"
         << "\n";
  } else {
    if (count % 2 == 0) {
      cout << "Second"
           << "\n";
    } else
      cout << "First"
           << "\n";
  }
}
int main() {
  long long t = 1;
  while (t--) solve();
}
