#include <iostream>
#include <algorithm>
#include <iterator>
#include <string>
#include <sstream>

//------------------------------------------------------------------------------
int main()
{
	std::string str;
	std::getline(std::cin, str);

	std::istringstream ss(str);
	auto count = std::count_if(std::istream_iterator<std::string>(ss), std::istream_iterator<std::string>(), 
				 [](const std::string& s){ return s == "a" || s == "A"; });

	std::cout << "Count of a's and A's: " << count << '\n';
}