import java.util.Scanner;

class Main {
    public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
    	 int A[] = new int [5];


    	 for(int i = 0; i<5;i++){
    		  A[i] = sc.nextInt();
    	 }
    	 int K = sc.nextInt();

    	 if(K >= (A[4]-A[0]) ){
    		 System.out.println("Yay!");

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

    }

} import java.util.Scanner; Scanner java.util class Main {
    public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
    	 int A[] = new int [5];


    	 for(int i = 0; i<5;i++){
    		  A[i] = sc.nextInt();
    	 }
    	 int K = sc.nextInt();

    	 if(K >= (A[4]-A[0]) ){
    		 System.out.println("Yay!");

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

    }

} Main public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
    	 int A[] = new int [5];


    	 for(int i = 0; i<5;i++){
    		  A[i] = sc.nextInt();
    	 }
    	 int K = sc.nextInt();

    	 if(K >= (A[4]-A[0]) ){
    		 System.out.println("Yay!");

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

    } main {
    	Scanner sc = new Scanner(System.in);
    	 int A[] = new int [5];


    	 for(int i = 0; i<5;i++){
    		  A[i] = sc.nextInt();
    	 }
    	 int K = sc.nextInt();

    	 if(K >= (A[4]-A[0]) ){
    		 System.out.println("Yay!");

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

    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int A[] = new int [5]; A new int [5] 5 for(int i = 0; i<5;i++){
    		  A[i] = sc.nextInt();
    	 } int i = 0; int i = 0; i 0 i<5 i 5 i++ i++ i {
    		  A[i] = sc.nextInt();
    	 } {
    		  A[i] = sc.nextInt();
    	 } A[i] = sc.nextInt() A[i] A i sc.nextInt() sc.nextInt sc int K = sc.nextInt(); K sc.nextInt() sc.nextInt sc if(K >= (A[4]-A[0]) ){
    		 System.out.println("Yay!");

    	 }else{
    		 System.out.println(":(");
    	 } K >= (A[4]-A[0]) K (A[4]-A[0]) A[4] A 4 A[0] A 0 {
    		 System.out.println("Yay!");

    	 } System.out.println("Yay!") System.out.println System.out System System.out "Yay!" {
    		 System.out.println(":(");
    	 } System.out.println(":(") System.out.println System.out System System.out ":(" String[] args args
import java.util.Scanner;

class Main {
    public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
    	 int A[] = new int [5];


    	 for(int i = 0; i<5;i++){
    		  A[i] = sc.nextInt();
    	 }
    	 int K = sc.nextInt();

    	 if(K >= (A[4]-A[0]) ){
    		 System.out.println("Yay!");

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

    }

}