#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
    char a;
    int litera=0,cuvant=0,scuv=1;
    while(f.get(a))
    {
        if((a<='z' && a>='a')||(a<='Z'&&a>='A'))
        {
            litera++;
            scuv=0;
        }
        else if(scuv==0)
        {
            cuvant++;
            scuv=1;
        }
    }
    if(scuv==0)
        cuvant++;
    g<<litera/cuvant;
}