#include <iostream>
#include <map>
#include <cstring>

int main() {
	std::map<char, int> alphaFrequency; 
	
	// fill map with chars A-Z (ascii 65 to 90)
	for (int i = 65; i < 91; i++)
	{
		alphaFrequency.insert(std::pair<char, int>(static_cast<char>(i), 0));
	}
	
	// get input
	char string[100] = {0};
	std::cin >> string;
	
	// iterate through chars in string, and increment the counter for the specific char it's on
	// if string[i] == 'A' then alphaFrequency['A'] is incremented
	for (int i = 0, len = strlen(string); i < len; i++)
	{
		alphaFrequency[toupper(string[i])] += 1;
	}
	
	std::cout << alphaFrequency['A'];
	
	return 0;
}