#include <fstream>
#include <vector>
#include <bitset>
#include <unordered_map>
#include <algorithm>
#include <queue>
#include <math.h>
#include <iomanip>
#include <stack>
  
using namespace std;

ifstream cin("text.in");
ofstream cout("text.out");

int words;
int letters;

main()
{
	string s;
	
	getline(cin, s);
	
	bool prev = 0;
	
	for(auto i : s)
		if(isalpha(i))
		{
			if(prev == 0)
				words++;
			prev = 1;
			letters++;
		}
		else
			prev = 0;
	cout << letters / words;
}