#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  string s;
  int l1, l, r, count = 0;
  cin >> s;
  l1 = s.size();
  int arr[l1];
  memset(arr, 0, sizeof(arr));
  int last = -1;
  for (int i = 0; i < l1;) {
    if (s[i] == s[i + 1]) {
      l = i;
      r = i + 1;
      while (s[l] == s[r] && l >= 0 && r < l1) {
        count++;
        s.erase(l, 1);
        s.erase(l, 1);
        l--;
        r--;
        l1 -= 2;
      }
      i = r - 1;
      last = r - 1;
    }
    i++;
  }
  if (count % 2)
    cout << "Yes\n";
  else
    cout << "No";
  return 0;
}
