#include <fstream>
#include <string>

std::ifstream fin("text.in");
std::ofstream fout("text.out");

std::string input;

char letters[26] = { '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()
{
	unsigned long long numberOfChars = 0;
	unsigned long long numberOfWords = 0;
	bool waspreviousLetter = false;
	bool found = false;
	getline(fin, input);
	for (int i = 0; i<input.size(); i++)
	{
		found = false;
		for (auto y : letters)
		{
			if (input[i] == y || input[i] == (y - 32))
			{
				found = true;
				if (waspreviousLetter == false)
				{
					numberOfWords++;
				}
				waspreviousLetter = true;
				numberOfChars++;
				break;
			}
		}
		if (found == false)
		{
			waspreviousLetter = false;
		}
	}
	fout << numberOfChars / numberOfWords;
	return 0;
}