L1-045 cosmic invincible greeting (5 points)

It is said that the first program learned by all programmers is to output a sentence on the screen “Hello World”, Say hello to the world . As a programmer in TIANTI game , You need to write more advanced programs , To be able to say hello to any designated planet .

Input format ：

Type in the name of a planet on the first line S, Is a by no more than 7 A word in English letters , End with a carriage return .

Output format ：

Output in one line Hello S, Follow the input S Say hello to the planet .

sample input ：

Mars

sample output ：

Hello Mars

Code ：

#include <iostream>
#include <string>
using namespace std;

int main(){
    string a;
    cin >> a;
    cout << "Hello " << a << endl;
}