#include "iostream"
#include <cstring>
#include <cwchar>
#include <string>

int main() {
  std::string msg = "hello world";
  for (int i = 0; i < msg.length(); i++) {
    std::cout << msg[i];
    if (i != msg.length() - 1 && msg[i+1] != ' ' && msg[i] != ' ')
      std::cout << '-';
  }
  return 0;
}