#include <cstring>
#include <cstdio>
#include <algorithm>
#include <ctime>
#define FIN "pscpld.in"
#define FOUT "pscpld.out"
#define NMAX 1000010

using namespace std;

char sz[NMAX];
int lg[NMAX * 2], dim = 0;

int main()
{
	long long ret = 0;
	int i, l, r, mirror, tmp;
	char c;
	FILE *fin = freopen(FIN, "r", stdin), *fout = freopen(FOUT, "w", stdout);

	for (c = getchar(); c >= 'a' && c <= 'z'; c = getchar()) sz[++dim] = c;

	for (i = 1, mirror = 0; i <= (dim << 1) - 1; ++i)
	{
		lg[i] = mirror + lg[mirror] <= i ? (i & 1 ? 1 : 0) 
			  : min(lg[(mirror << 1) - i], mirror + lg[mirror] - i);
		if (i & 1) l = ((i + 1) >> 1) - ((lg[i] + 1) >> 1) , r = ((i + 1) >> 1) + ((lg[i] + 1) >> 1);
		else l = (i - lg[i]) >> 1, r = ((i + lg[i]) >> 1) + 1;
		
		tmp = l;
		
		while (l > 0 && (r <= dim))
			if (sz[l] == sz[r]) --l, ++r;
			else break;

		lg[i] += (tmp - l) << 1;

		mirror = mirror + lg[mirror] < i + lg[i] ? i : mirror;

		ret += ((long long)lg[i] + 1) >> 1;
	}

	printf("%lld\n", ret);
	return 0;
}