#include <fstream>

using namespace std;

ifstream f("text.in");
ofstream g("text.out");

long long nrl, nrc;
char x, x1;

int main()
{
    while(f.get(x))
        {   if((x >= 'a' && x <= 'z') || (x >= 'A' && x <= 'Z')) nrl++;
            else if((x1 >= 'a' && x1 <= 'z') || (x1 >= 'A' && x1 <= 'Z')) nrc++;
            x1 = x;
        }
    g << nrl/nrc << '\n';
    return 0;
}