#include <bits/stdc++.h>

using namespace std;

ifstream fin("pscpld.in");
ofstream fout("pscpld.out");
char c[1000002];
int n, i, r;

static inline void Calc(int st, int dr) {
    while(0 < st && dr < n && c[st] == c[dr]) {
        r++;
        st--;
        dr++;
    }
}

int main() {
    fin >> c;
    n = strlen(c);

    for(i = 1; i <= n; i++) {
        Calc(i, i);
        Calc(i, i + 1);
    }
    fout << r;

    return 0;
}