Programming Education

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.

Constraints

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

Input

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

1

2 A B

Output

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

Examples

Input

1

Output

Hello World

Input

2 3 5

Output

8

inputFormat

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.

Constraints

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

Input

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

1

2 A B

outputFormat

Output

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

Examples

Input

1

Output

Hello World

Input

2 3 5

Output

8

样例

1

Hello World