#include<iostream>
#include<fstream>
using namespace std;
main(){
	ifstream f1("text.in");
	ofstream f2("text.out");
	int nrc=0,nrcu=0,ir,rest;
	char c;
	while(f1.get(c)){
		ir=c;
		if((ir>=97)&&(ir<=122))
			nrc++;
		if(ir==32)
			nrcu++;
	}
	nrc++;
	nrcu++;	
	rest=nrc/nrcu;
	f2<<rest;
}