#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;
}