#include <iostream>

int main() {
    std::cout << "Hello world !" << std::endl;
    std::cout << "hello world. " << std::endl;
    std::cout << "hello world !" << std::endl;
    std::cout <<"hello world !" << std::endl;
    std::cout << "hello everybody !" << std::endl;
    std::cout << "hello and see you tomorrow ! " << std::endl;
    return 0;
}