#include <bits/stdc++.h>
using namespace std;


int main(void){
    ofstream cout("text.out");
    ifstream cin("text.in");
    char c;
    long long int litere = 0, cuv = 0, cnt= 0;
    while(cin.get(c)){
        if(isalpha(c)){
            litere++;
            ++cnt;
        }else{
            if(cnt > 0){
                cuv++;
            }
            cnt = 0;
        }
    }
   cout << litere / cuv<<endl;
}