#include <iostream>
#include <cstdlib>

#include "simple_string.hpp"
#include "moving_string.hpp"
#include "rrefopt_string.hpp"

int main() {
  //using namespace simple;
  //using namespace moving;
  using namespace rrefopt;

  string a("a"), b("b"), c("c"), d("d");

  string abcd(a + b + c + d + a + b + c + d);
  std::cout << abcd << std::endl;

  return EXIT_SUCCESS;
}