import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      int d = sc.nextInt();
      int e = sc.nextInt();
      int k = sc.nextInt();
      int[] S = new int[]{a,b,c,d,e};
      
      int max = S[0];
      int min = S[0];
      for (int i = 0; i < S.length; i++) {
        int v = S[i];
        if(v > max){
          max = v;
        }if(v < min){
          min = v;
        }
      }
      
      if(max-min <= k){
        System.out.println("Yay!");
      }else{
        System.out.println(":(");
      }
    }
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      int d = sc.nextInt();
      int e = sc.nextInt();
      int k = sc.nextInt();
      int[] S = new int[]{a,b,c,d,e};
      
      int max = S[0];
      int min = S[0];
      for (int i = 0; i < S.length; i++) {
        int v = S[i];
        if(v > max){
          max = v;
        }if(v < min){
          min = v;
        }
      }
      
      if(max-min <= k){
        System.out.println("Yay!");
      }else{
        System.out.println(":(");
      }
    }
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      int d = sc.nextInt();
      int e = sc.nextInt();
      int k = sc.nextInt();
      int[] S = new int[]{a,b,c,d,e};
      
      int max = S[0];
      int min = S[0];
      for (int i = 0; i < S.length; i++) {
        int v = S[i];
        if(v > max){
          max = v;
        }if(v < min){
          min = v;
        }
      }
      
      if(max-min <= k){
        System.out.println("Yay!");
      }else{
        System.out.println(":(");
      }
    } main {
		Scanner sc = new Scanner(System.in);
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      int d = sc.nextInt();
      int e = sc.nextInt();
      int k = sc.nextInt();
      int[] S = new int[]{a,b,c,d,e};
      
      int max = S[0];
      int min = S[0];
      for (int i = 0; i < S.length; i++) {
        int v = S[i];
        if(v > max){
          max = v;
        }if(v < min){
          min = v;
        }
      }
      
      if(max-min <= k){
        System.out.println("Yay!");
      }else{
        System.out.println(":(");
      }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc int c = sc.nextInt(); c sc.nextInt() sc.nextInt sc int d = sc.nextInt(); d sc.nextInt() sc.nextInt sc int e = sc.nextInt(); e sc.nextInt() sc.nextInt sc int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc int[] S = new int[]{a,b,c,d,e}; S new int[]{a,b,c,d,e} int max = S[0]; max S[0] S 0 int min = S[0]; min S[0] S 0 for (int i = 0; i < S.length; i++) {
        int v = S[i];
        if(v > max){
          max = v;
        }if(v < min){
          min = v;
        }
      } int i = 0; int i = 0; i 0 i < S.length i S.length S S.length i++ i++ i {
        int v = S[i];
        if(v > max){
          max = v;
        }if(v < min){
          min = v;
        }
      } {
        int v = S[i];
        if(v > max){
          max = v;
        }if(v < min){
          min = v;
        }
      } int v = S[i]; v S[i] S i if(v > max){
          max = v;
        } v > max v max {
          max = v;
        } max = v max v if(v < min){
          min = v;
        } v < min v min {
          min = v;
        } min = v min v if(max-min <= k){
        System.out.println("Yay!");
      }else{
        System.out.println(":(");
      } max-min <= k max-min max min k {
        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 public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      int d = sc.nextInt();
      int e = sc.nextInt();
      int k = sc.nextInt();
      int[] S = new int[]{a,b,c,d,e};
      
      int max = S[0];
      int min = S[0];
      for (int i = 0; i < S.length; i++) {
        int v = S[i];
        if(v > max){
          max = v;
        }if(v < min){
          min = v;
        }
      }
      
      if(max-min <= k){
        System.out.println("Yay!");
      }else{
        System.out.println(":(");
      }
    }
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      int d = sc.nextInt();
      int e = sc.nextInt();
      int k = sc.nextInt();
      int[] S = new int[]{a,b,c,d,e};
      
      int max = S[0];
      int min = S[0];
      for (int i = 0; i < S.length; i++) {
        int v = S[i];
        if(v > max){
          max = v;
        }if(v < min){
          min = v;
        }
      }
      
      if(max-min <= k){
        System.out.println("Yay!");
      }else{
        System.out.println(":(");
      }
    }
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = sc.nextInt();
      int d = sc.nextInt();
      int e = sc.nextInt();
      int k = sc.nextInt();
      int[] S = new int[]{a,b,c,d,e};
      
      int max = S[0];
      int min = S[0];
      for (int i = 0; i < S.length; i++) {
        int v = S[i];
        if(v > max){
          max = v;
        }if(v < min){
          min = v;
        }
      }
      
      if(max-min <= k){
        System.out.println("Yay!");
      }else{
        System.out.println(":(");
      }
    }
}