#include <string>
#include <vector>
#include <algorithm>
#include <iostream>
#include <fstream>
using namespace std;

int medlc(string s) {
    string w;
    int c=0,l=0;
    for (int i = 0; i < s.size(); i++)
    {
        if((s[i]>='a'&&s[i]<='z')||(s[i]>='A'&&s[i]<='Z'))
        {
           l++;
            if((s[i+1]<'A'&&s[i+1]>'a')||(s[i+1]<'Z'||s[i+1]>'z')){c++;}
        }
    }

    return l/c  ;
}

int main() {
    ifstream t1("text.in");
    ofstream t2("text.out");
    string s;
    getline(t1,s);
    t2<<medlc(s);
}