In $2020$, AtCoder Inc. with an annual sales of more than one billion yen (the currency of Japan) has started a business in programming education.  
One day, there was an exam where a one-year-old child must write a program that prints `Hello World`, and a two-year-old child must write a program that receives integers $A, B$ and prints $A+B$.  
Takahashi, who is taking this exam, suddenly forgets his age.  
He decides to write a program that first receives his age $N$ ($1$ or $2$) as input, then prints `Hello World` if $N=1$, and additionally receives integers $A, B$ and prints $A+B$ if $N=2$.  
Write this program for him.

Input is given from Standard Input in one of the following formats:

```
1
```
```
2
$A$
$B$
```

If $N=1$, print `Hello World`; if $N=2$, print $A+B$.

-   $N$ is $1$ or $2$.
-   $A$ is an integer between $1$ and $9$ (inclusive).
-   $B$ is an integer between $1$ and $9$ (inclusive).

Hello World

As N=1, Takahashi is one year old. Thus, we should print Hello World.

8

As N=2, Takahashi is two years old. Thus, we should print A+B, which is 8 since A=3 and B=5.