#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;
}