#include <bits/stdc++.h>
using namespace std;
ifstream input("text.in");
ofstream print("text.out");
char c;
bool ok=false;
int nr,nrnr;
int main(){
    while(!input.eof()){
            input>>c;
            if(isalpha(c)){
                if(!ok)nr++,ok=true;
                nrnr++;
            }
            else ok=false;
    }
    print<<nrnr/nr;
}