#include<string.h>
#include<iostream>
#include<fstream>
using namespace std;
int main()
{
	ifstream cin("text.in");
	ofstream cout("text.out");
char c;
int k=0,cuv=0,lit=0;
cin>>c;
while(!cin.eof())
{
	if(c>='a'&&c<='z'||c>='A'&&c<='Z')
	{
		lit++;
		if(k==0) cuv++;k=1;
	}
	else k=0;
	cin>>c;
}  	
cout<<lit/cuv;
return 0;
}