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


char Caractere[]={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O'
,'P','Q','R','S','T','U','V','W','X','Y','Z'};

int main(void)
{
	int length; char * buffer;
	ifstream is("text.in");
	ofstream fout("text.out");
	is.seekg (0, ios::end);
	length = is.tellg();
	is.seekg (0, ios::beg);
	buffer = new char [length];
	is.read (buffer,length);
	is.close();
	int n,i,num=0, cuv=1;
	for(i=0;i<length-1;i++)
	{
		for(n=0;n<sizeof(Caractere);n++)
		{
			if(buffer[i]==Caractere[n]) num++;
		}
		if(buffer[i]==' ') cuv++;
	}
	fout<<num/cuv;
	return 0;
}