function Main(input){
	input = input.split("\n");
    nums = input.map(input=>parseInt(input,10))
    var A = nums[1];
    var B = nums[2];
  
	if(nums[0] === 1){
		console.log("Hello World");	
	}else{
        console.log(A+B);        
	}
}
Main(require("fs").readFileSync("/dev/stdin","utf8"));