import java.util.Scanner;
 
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
      	int[] inputNum = new int[6];
 
		for(int i = 0 ; i < inputNum.length; i++) {
			inputNum[i] = sc.nextInt();
          //コードテスト用
          	//System.out.println(inputNum[i]);
		}
      
    	
      	int min = inputNum[0];
      	int max = inputNum[0];
       	for(int i = 1 ; i < inputNum.length-1; i++) {
			if(inputNum[i] <= min){
            	min = inputNum[i];
            }
            if(inputNum[i] >= max){
            	max = inputNum[i];
            }
		}
      
      	//コードテスト用
      	//int distance = max-min;
      	//System.out.println(distance);
      
      	if(max-min > inputNum[5]){
        	System.out.print(":("); 
        }else{
          	System.out.print("Yay!");
        }
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz