#include <iostream>
#include <fstream>

using namespace std;

ifstream f("pscpld.in");
ofstream g("pscpld.out");
const int NMAX = 1000002;
int manacher[2 * NMAX];

int main()
{
    string finalString = "@#";
    string s;
    f >> s;
    for (int i = 0; i < s.size(); i++)
    {
        finalString += s[i];
        finalString += "#";
    }
    finalString += "$";
    int best = 0;
    long long ans = 0;
    for (int i = 1; i < finalString.size() - 1; i++)
    {
        if (best + manacher[best] > i)
        {
            manacher[i] = min(manacher[best] + best - i, manacher[2 * best - i]);
        }
        else
            manacher[i] = 0;
        while (finalString[i - manacher[i] - 1] == finalString[i + manacher[i] + 1])
        {
            manacher[i]++;
        }
        if (i + manacher[i] > best + manacher[best])
        {
            best = i;
        }
        ans += (manacher[i] + 1) / 2;
    }
    g<<ans;
    return 0;
}