#include <iostream>
#include <fstream>
#include <cstring>
#define X 2000001

using namespace std;
int LP[X],n,i,r=2,c=1,oglinda,dif;
char a[X];
int main()
{
    ifstream fin("pscpld.in");
    ofstream fout("pscpld.out");
    fin.get(a,X);
    n=strlen(a);
    n=2*n+1;
    LP[0]=0;
    LP[1]=1;
    for(int i=2;i<=n;i++)
    {
        oglinda=2*c-i;
        dif=r-i;
        if(dif>0)
            LP[i]=min(LP[oglinda],dif);
         while ( ((i + LP[i]) < n && (i - LP[i]) > 0) && ( ((i + LP[i] + 1) % 2 == 0) || (a[(i + LP[i] + 1)/2] == a[(i - LP[i] - 1)/2] )))
        {
            LP[i]++;
        }
        if (i + LP[i] > r)
        {
            c = i;
            r = i + LP[i];
        }
    }
      long long s=0;
        for(int i=1;i<n;i++)
            if(LP[i]%2==1)
                s=s+LP[i]/2+1;
            else
                s=s+LP[i]/2;
        fout<<s;



    return 0;
}