#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';
}

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

YWFhYWFhYWEgYSBhc2QgbGFsYWwgQSB3b29v

aaaaaaaa a asd lalal A wooo