#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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