#include <iostream>
#include <string.h>
#include <ctype.h>
#include <fstream>
using namespace std;
ifstream in("text.in");
ofstream out("text.out");
int main () {
	int nrcuv=0,nrlit=0,n,i,lmed;
	char s[1050000];
	in.get(s,1049999);
	in.get();
	n=strlen(s);
	if (isalpha(s[0])) nrlit=nrcuv=1;
	for (i=1;i<n;i++)
		{if (!isalpha(s[i-1]) && isalpha(s[i])) nrcuv++;
		if (isalpha(s[i])) nrlit++;}
	
	lmed=nrlit/nrcuv;
	out<<lmed;
	
		
	
	
}