#include <iostream>
using namespace std;

int ArrRealLength(char* arr) {
	int i = 0;
	while (arr[i] != '\0') {
		i++;
	}
	return i;
}

bool IsWordValid(char* str) {
	bool isWordValid;
	int strRealLength = ArrRealLength(str);
	for (int i = 0; i < strRealLength; i++)
	{
		if ((str[i] >= 'A' && str[i] <= 'Z') || (str[i] >= 'a' && str[i] <= 'z') || str[i] == '-' || str[i] == '_') {
			isWordValid = true;
		}
		else {
			isWordValid = false;
			break;
		}
	}

	return isWordValid;
}
int CounterNumberOfShortestWords(int counterLetters, int counterNumberOfShortestWords, int numberLettersShortestWord) {
	if (counterLetters < numberLettersShortestWord) {
		counterNumberOfShortestWords = 1;
		numberLettersShortestWord = counterLetters;
	}
	else if (counterLetters == numberLettersShortestWord) {
		counterNumberOfShortestWords++;
		numberLettersShortestWord = counterLetters;
	}
	return counterNumberOfShortestWords;
}

int NumberLettersShortestWord(int counterLetters, int counterNumberOfShortestWords, int numberLettersShortestWord) {
	if (counterLetters < numberLettersShortestWord) {
		counterNumberOfShortestWords = 1;
		numberLettersShortestWord = counterLetters;
	}
	else if (counterLetters == numberLettersShortestWord) {
		counterNumberOfShortestWords++;
		numberLettersShortestWord = counterLetters;
	}
	return numberLettersShortestWord;
}

int NumberOfShortestWords(char* str) {
	int counterNumberOfShortestWords = 0;
	int counterLetters = 0;
	int numberLettersShortestWord = INT_MAX;
	char currentWord[100] = {};


	int strRealLength = ArrRealLength(str);
	for (int i = 0; i < strRealLength; i++)
	{
		if (str[i] == ' ' || str[i] == '\t') {

			if (counterLetters == 0) {
				continue;
			}
			else {
				if (IsWordValid(currentWord) == true) {


					if (counterLetters <= numberLettersShortestWord) {
						counterNumberOfShortestWords = CounterNumberOfShortestWords(counterLetters, counterNumberOfShortestWords, numberLettersShortestWord);
						numberLettersShortestWord = NumberLettersShortestWord(counterLetters, counterNumberOfShortestWords, numberLettersShortestWord);
					}
					/*if (counterLetters < numberLettersShortestWord) {
						counterNumberOfShortestWords = 1;
						numberLettersShortestWord = counterLetters;
					}
					else if (counterLetters == numberLettersShortestWord) {
						counterNumberOfShortestWords++;
						numberLettersShortestWord = counterLetters;
					}*/

					for (int i = 0; i < counterLetters; i++)
					{
						currentWord[i] = {};
					}
					counterLetters = 0;
				}

			}

		}

		else {
			currentWord[counterLetters]+= str[i];
			counterLetters++;
			if (IsWordValid(currentWord) == true && i == strRealLength - 1) {


				if (counterLetters <= numberLettersShortestWord) {
					counterNumberOfShortestWords = CounterNumberOfShortestWords(counterLetters, counterNumberOfShortestWords, numberLettersShortestWord);
					numberLettersShortestWord = NumberLettersShortestWord(counterLetters, counterNumberOfShortestWords, numberLettersShortestWord);
				}

					/*if (counterLetters < numberLettersShortestWord) {
						counterNumberOfShortestWords = 1;
						numberLettersShortestWord = counterLetters;
					}
					else if (counterLetters == numberLettersShortestWord) {
						counterNumberOfShortestWords++;
						numberLettersShortestWord = counterLetters;
					}	*/
			}
		}
	}
	return counterNumberOfShortestWords;
}

int main()
{
	char str[100];
	cin.getline(str,100);

	// Finding the number of the shortest valid words in str
	int numberOfShortestWords = NumberOfShortestWords(str);
	cout << numberOfShortestWords;

	return 0;
}