#include <fstream>
using namespace std;
ifstream ka("text.in");
ofstream ki("text.out");
bool p=true;
long long cuv,lungime;
char a;
int main()
{
    ka>>noskipws;
    while(ka>>a)
    {
        if(('a'<=a&&a<='z')||('A'<=a&&a<='Z'))
        {
            if(p)
            {cuv++;
            p=false;}
            lungime++;
        }
        else
        {
            p=true;
        }
    }
    ki<<lungime/cuv;
}