#include<iostream>
#include<fstream>
#include<cctype>

using namespace std;

int main()
{
    char s[1000000];
    ifstream f("text.in");
    ofstream g("text.out");
    int l=0,ap=0,i,cuvant=0;
    f>>s;
    while(!f.eof()) {
        for(i=0;s[i]!='\0';i++)
        {
            if(isalpha(s[i]))
            {
                l++;
                cuvant=1;
            }
            else
            {
                ap+=cuvant;
                cuvant=0;
            }
        }
        f>>s;
        ap+=cuvant;
        cuvant=0;
    }
    g<<l/ap<<endl;
    g.close();
}