#include <iostream>
using namespace std;

int main() {
  string str = "gesp.ccf.org.cn";

  string delimiter = ".";
  string result="";
  string token;
  size_t found = str.find(delimiter);
  while (found != string::npos) {
   token = str.substr(0, found);
   result += token;
   result += " ";
   __________________________ // 在此处填入代码
   found = str.find(delimiter);
  }

  //最后一部分
  result += str;
  result += " ";

  cout << result << endl;
  return 0;
}