#include <iostream>

#include <fstream>
#include <sstream>
#include <string.h>
using namespace std;


int main()
{
	int cuvCount=0;
	bool check=false;
	int lastPos=0;

  

    
    
    std::ifstream file("cuvinte.in");
    std::stringstream buffer;
    ofstream cout("cuvinte.out");
    
    buffer << file.rdbuf();
    std::string str = buffer.str();
    
    for(int i=0;i<str.length();i++){
	   
	   
    if (str[i] == ' ' || str[i] == '.' || str[i] == '!' || str[i] == '?' || str[i] == '-'){
    	
       cuvCount++;
		
        
    }
	  
	 
	}
    
    std:: cout << (str.length()-cuvCount)/cuvCount ;
   
	    
    return 0;
}