#include <stdio.h>
#define NMAX 2000020

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

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

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

        poz = 0; max = 1;
        V[0] = 1; i = 1;

        while (i<N)
        {
               j = num = 0;
               while (S[i-j]==S[i+j] && (i>=j && i+j < N))
               {
                     if (S[i-j] != ' ') num++;
                     j++;
               }
               V[i] = (num<<1)-((i+1)&1);
               max = V[i]; poz = i;
               i++;
        }

        for (i = 0; i < N; i++) sum+=((V[i]>>1)+(V[i]&1));
        freopen("pscpld.out", "w", stdout);
        printf("%d\n", sum);

        return 0;
        
}