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#include <fstream>
#include <cstring>
#define nMax 1000000
using namespace std;
ifstream x ("pscpld.in");
ofstream y ("pscpld.out");
int n,nr;
char a[nMax];
void check_for_palindrom(int l, int r)
{
nr++;
l--;
r++;
if(a[l]==a[r])
check_for_palindrom(l,r);
}
int main()
{
int i;
x>>a;
nr=n=strlen(a);
for(i=1;i<n;i++)
if(a[i]==a[i-1])
check_for_palindrom(i-1,i);
for(i=1;i<n-1;i++)
if(a[i-1]==a[i+1])
check_for_palindrom(i-1,i+1);
y<<nr<<'\n';
return 0;
}