#include<iostream>
#include<fstream>
#include<string>
using namespace std;
long long cuv,l;
int main()
{
	ifstream f("text.in");
	ofstream g("text.out");
	char s,cop;
	cuv=0;
	while(!f.eof())
	{
		f>>s;
		if(isalpha(s))
		{
			l++;
			if(isalpha(cop)==0)
				cuv++;
		}
		cop=s;
	}
	if(isalpha(s)==1)
		cuv++;
	g<<(int)l/cuv;
	f.close();
	g.close();
	return 0;
}