#include <bits/stdc++.h>
using namespace std;
ifstream f("pscpld.in");
ofstream g("pscpld.out");
// #define f cin
// #define g cout
// code-runner.runInTerminal
string s("&#");
vector<int> lps;
long long rez;
int main()
{
    for (char ch; f >> ch;)
        s += ch, s += '#', rez++;
    s += '$';
    lps.resize(s.size());
    int c = 0, r = 0;
    for (int i = 1; i < s.size() - 2; i++)
    {
        int im = 2 * c - i;
        if (r > i)
            lps[i] = min(r - i, lps[im]);
        while (s[i + 1 + lps[i]] == s[i - 1 - lps[i]])
            lps[i]++;
        if (i + lps[i] > r)
            c = i, r = i + lps[i];
        if (i % 2 == 0)
            rez += (lps[i] - 1) / 2;
        else
            rez += (lps[i]) / 2;
    }
    g << rez;
    return 0;
}