#include <iostream>
#include <string>
int main() {
    char a; std::string answer;
    do {
        std::cout << "Write symbol " <<;
        std::cin >> a;
            std::cout << "Continue? (yes or no)";
            std::cin.clear();
            std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
            do {
                std::getline(std::cin, answer);
            if (answer != "yes" && answer != "no") { std::cout << "You didn't write answer. Try again." << std::endl; }
        } while(answer !="yes" && answer!="no");
    } while (answer !="no");
    std::cout << a << ", " << std::endl;
    return 0;
}