#include <bits/stdc++.h>
using namespace std;
const int N = 1e3 + 5;
int main() {
  string s;
  cin >> s;
  map<char, int> mp;
  for (int i = 0; i < s.length(); i++) ++mp[s[i]];
  vector<int> v;
  for (auto it : mp) v.push_back(it.second);
  int cnt = 0;
  for (int i = 0; i < v.size(); i++)
    if (v[i] & 1) ++cnt;
  if (!cnt) return puts("First"), 0;
  puts(--cnt & 1 ? "Second" : "First");
  return 0;
}
