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


int main()
{
	
	ifstream  f("text.in");
	ofstream  g("text.out");
	string a;
	int k=0,k1=0,ok=0,i;
	getline (f,a);
	int z;
	z=a.length();
	for(i=0;i<=z;i++)
	{
		if( (a[i]>=65 && a[i]<=90) || ( a[i]>=97 && a[i]<=122) )
		{
			ok=1;k1++;
		}
		else
		{
			if(ok==1)
				{ok=0;k++;}
		}
		
		
	
	}
	
	int r;
	r=k1/k;
	g<<r;
	return 0;
	
}