#include <bits/stdc++.h>
using namespace std;
int main() {
  (ios_base::sync_with_stdio(false), cin.tie(NULL));
  ;
  string s;
  int arr[26];
  memset(arr, 0, sizeof(arr));
  cin >> s;
  for (int i{0}; i < s.length(); i++) {
    arr[s[i] - 'a']++;
  }
  bool isPalindrome{true};
  if (s.length() & 1) {
    bool flag{false};
    for (int i = 0; i < 26; i++) {
      if (arr[i] & 1) {
        if (flag) {
          isPalindrome = false;
          break;
        }
        flag = true;
      }
    }
  } else {
    for (int i = 0; i < 26; i++) {
      if (arr[i] & 1) {
        isPalindrome = false;
        break;
      }
    }
  }
  if (isPalindrome) {
    cout << "First\n";
  } else {
    if (s.length() & 1) {
      cout << "First\n";
    } else {
      cout << "Second\n";
    }
  }
  return 0;
}
