/******************************************************************************

                              Online C++ Compiler.
               Code, Compile, Run and Debug C++ program online.
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*******************************************************************************/

#include <fstream>

using namespace std;
ifstream cin("pscpld.in");
ofstream cout("pscpld.out");
int rz[2001],n,r,l;
char s[1001],q[2001];
int main()
{
    cin>>s;
    q[n++]='#';
    for(int i=0;s[i]!='\0';i++)
         {
             q[n++]=s[i];
             q[n++]='#';
         }
    q[n]='\0';
    for(int i=0;i<n;i++)
    {
        if(i>r)
           rz[i]=0;
        else
            rz[i]=min(r-i,rz[r+l-i]);
      while(i-rz[i]>=0 && q[i+rz[i]]==q[i-rz[i]])
          rz[i]++;
    rz[i]--;
    if(i+rz[i]>r)
    {
        r=i+rz[i];
        l=i-rz[i];
    }
    }
    int nr=0;
    for(int i=0;i<n;i++)
       nr=nr+(rz[i]+1)/2;
       cout<<nr;
    return 0;
}