
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
    //  String[] nyu=sc.nextLine().split(" ");
   //  String nyu=sc.nextLine();

int[] num=new int[6];

for(int i=0;i<6;i++){
num[i]=Integer.parseInt(sc.nextLine());
}

if(num[4]-num[0]<num[5]+1){
System.out.println("Yay!");

}else{
System.out.println(":"+"(");

}


//int A=Integer.parseInt(nyu[0]);
//int B=Integer.parseInt(nyu[1]);



	}
}
/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