#include <bits/stdc++.h>
using namespace std;
int main() {
  int tot = 1, ev = 0, od = 0;
  string s;
  cin >> s;
  sort(s.begin(), s.end());
  for (int i = 1; i <= s.length(); ++i) {
    if (s[i] == s[i - 1])
      tot++;
    else if (s[i] != s[i - 1] && tot % 2 == 1) {
      od++;
      tot = 1;
    } else if (s[i] != s[i - 1] && tot % 2 == 0) {
      ev++;
      tot = 1;
    }
  }
  if (od > 0) {
    if (((od - 1) % 2 == 0))
      cout << "First"
           << "\n";
    else
      cout << "Second"
           << "\n";
  } else
    cout << "First"
         << "\n";
  return 0;
}
