# -*- coding: utf-8 -*-


def main():
    n = int(input())

    if n == 1:
        print("Hello World")
    else:
        a = int(input())
        b = int(input())
        print(a + b)


if __name__ == '__main__':
    main()

# -*- coding: utf-8 -*-


def main():
    n = int(input())

    if n == 1:
        print("Hello World")
    else:
        a = int(input())
        b = int(input())
        print(a + b)


if __name__ == '__main__':
    main()

# -*- coding: utf-8 -*-