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

int main(){
    ifstream f("text.in");
    ofstream g("text.out");
    string text;

    f >> text;
    text = "- Lasa-ma in pace, ca am invatat azi noapte toata ziua!";
    int space = 0, x=0;
    for(int i=0;i<text.size();i++){
        if(text[i] == ' ')
            space ++;
        if(!isalpha(text[i]) && text[i] != ' ')
            x++;

    }
    int z = text.size() - space - x;
    int y = space+1;


   g << z / y;

    f.close();
    g.close();
    return 0;
}