#include <stdio.h>
#define NMAX 2000020

char S[NMAX], s[1000010];
long long V[NMAX];
int N;

int main()
{
        int i, j, max, poz=0, num, d;
        long long sum=0;

        freopen("pscpld.in", "r", stdin);
        gets(s);
        N = strlen(s);
        S[poz++] = ' ';
        for (i = 0; i < N; i++)
            S[poz++] = s[i], S[poz++] = ' ';
        N = poz-1;

        poz = 1; max = 1;
        V[1] = 1; i = 1;

        for (i = 2; i <= N; i++)
        {
                d = i-poz+1;
                j = (d<=max)*(1+(V[poz-d+1]>>1));
                num = (d<=max)*V[poz-d+1];
                if (i+j>N) num = (i+j-N)+(S[i]==' ');
                for (; (i>=j) && (i+j<= N) && (S[i-j]==S[i+j]); j++)
                    num += ((S[i-j]!=' ')<<1);
                V[i] = num-(d>max)*(S[i]!=' ');
                if ((max<V[i]) || (d==max)) max = V[i], poz = i;
        }

        for (i = 1; i <= N; i++) sum+=((V[i]>>1)+(V[i]&1));
        freopen("pscpld.out", "w", stdout);
        printf("%lld\n", sum);

        return 0;
        
}