#include <iostream>

int main() {
	unsigned char pc[4] = {'t','e','s','t'};
	
	std::cout << std::string(&pc[0], &pc[3]) << std::endl;
	std::cout << std::string(&pc[0], &pc[4]) << std::endl;
	
	std::string s("abc");
	
	std::cout << std::string(s.begin(), s.end()) << std::endl;
	
	return 0;
}