import java.util.*;
class Main{
	public static void main(String[] args){
      Scanner sc = new Scanner(System.in);
      int min = sc.nextInt();
      sc.nextInt();sc.nextInt();sc.nextInt();
      int max = sc.nextInt();
      int limit = sc.nextInt();
      if(max-min<=limit)
        System.out.println("Yay!");
      else
        System.out.println(":(");
      return;
    }
} import java.util.*; util.* java class Main{
	public static void main(String[] args){
      Scanner sc = new Scanner(System.in);
      int min = sc.nextInt();
      sc.nextInt();sc.nextInt();sc.nextInt();
      int max = sc.nextInt();
      int limit = sc.nextInt();
      if(max-min<=limit)
        System.out.println("Yay!");
      else
        System.out.println(":(");
      return;
    }
} Main public static void main(String[] args){
      Scanner sc = new Scanner(System.in);
      int min = sc.nextInt();
      sc.nextInt();sc.nextInt();sc.nextInt();
      int max = sc.nextInt();
      int limit = sc.nextInt();
      if(max-min<=limit)
        System.out.println("Yay!");
      else
        System.out.println(":(");
      return;
    } main {
      Scanner sc = new Scanner(System.in);
      int min = sc.nextInt();
      sc.nextInt();sc.nextInt();sc.nextInt();
      int max = sc.nextInt();
      int limit = sc.nextInt();
      if(max-min<=limit)
        System.out.println("Yay!");
      else
        System.out.println(":(");
      return;
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int min = sc.nextInt(); min sc.nextInt() sc.nextInt sc sc.nextInt() sc.nextInt sc sc.nextInt() sc.nextInt sc sc.nextInt() sc.nextInt sc int max = sc.nextInt(); max sc.nextInt() sc.nextInt sc int limit = sc.nextInt(); limit sc.nextInt() sc.nextInt sc if(max-min<=limit)
        System.out.println("Yay!");
      else
        System.out.println(":("); max-min<=limit max-min max min limit System.out.println("Yay!") System.out.println System.out System System.out "Yay!" System.out.println(":(") System.out.println System.out System System.out ":(" return; String[] args args
import java.util.*;
class Main{
	public static void main(String[] args){
      Scanner sc = new Scanner(System.in);
      int min = sc.nextInt();
      sc.nextInt();sc.nextInt();sc.nextInt();
      int max = sc.nextInt();
      int limit = sc.nextInt();
      if(max-min<=limit)
        System.out.println("Yay!");
      else
        System.out.println(":(");
      return;
    }
}