#include <fstream>
#include <vector>
#include <string>

using namespace std;

ifstream cin ("pscpld.in");
ofstream cout ("pscpld.out");

void Solve (string &s) {

  vector < int > pali ((int) s.size() + 1);

  int R = -1, o = -1;
  for (int i = 0; i < (int) s.size(); ++ i) {
    if (i >= R) {
      o = i;
      while (i - pali[i] >= 0 and s[i + pali[i]] == s[i - pali[i]] and i + pali[i] < (int) s.size()) {
        ++ pali[i];
      }
      -- pali[i];
      R = i + pali[i];
      continue;
    }

    pali[i] = pali[2 * o - i];
    if (i + pali[i] < R) {
      continue;
    }

    pali[i] = R - i;
    while (i - pali[i] >= 0 and s[i + pali[i]] == s[i - pali[i]] and i + pali[i] < (int) s.size ()) {
      ++ pali[i];
    }
    -- pali[i];

    R = i + pali[i];
    o = i;
  }

  long long ans = 0;
  for (int i = 0; i < (int) s.size(); ++ i) {
    if (i % 2 == 0) {
      ans += (pali[i] / 2 + 1);
    }
    else {
      ans += ((pali[i] + 1) / 2);
    }
  }
  
  cout << ans << '\n';
}

int main () {
  ios::sync_with_stdio (false);

  string s;
  s.reserve (1e6 + 7);
  char c;
  while (cin >> c) {
    s += c;
    s += '#';
  }
  s.pop_back ();

  Solve (s);
}