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();
    boolean p = true;

    int m = Math.abs(a - b);
    int n = Math.abs(a - c);
    int l = Math.abs(a - d);
    int x = Math.abs(a - e);
    int y = Math.abs(b - c);
    int z = Math.abs(b - d);
    int q = Math.abs(b - e);
    int w = Math.abs(c - d);
    int r = Math.abs(c - e);
    int t = Math.abs(d - e);

    int data[] = { m , n , l , x , y , z , q , w , r , t };

    for (int i = 0 ; i < data.length ; i++ ) {

      if ( data[i] <= k ) {
        p = true;
      } else {
        p = false;
        break;
      }
    }

    if (p) {
      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();
    boolean p = true;

    int m = Math.abs(a - b);
    int n = Math.abs(a - c);
    int l = Math.abs(a - d);
    int x = Math.abs(a - e);
    int y = Math.abs(b - c);
    int z = Math.abs(b - d);
    int q = Math.abs(b - e);
    int w = Math.abs(c - d);
    int r = Math.abs(c - e);
    int t = Math.abs(d - e);

    int data[] = { m , n , l , x , y , z , q , w , r , t };

    for (int i = 0 ; i < data.length ; i++ ) {

      if ( data[i] <= k ) {
        p = true;
      } else {
        p = false;
        break;
      }
    }

    if (p) {
      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();
    boolean p = true;

    int m = Math.abs(a - b);
    int n = Math.abs(a - c);
    int l = Math.abs(a - d);
    int x = Math.abs(a - e);
    int y = Math.abs(b - c);
    int z = Math.abs(b - d);
    int q = Math.abs(b - e);
    int w = Math.abs(c - d);
    int r = Math.abs(c - e);
    int t = Math.abs(d - e);

    int data[] = { m , n , l , x , y , z , q , w , r , t };

    for (int i = 0 ; i < data.length ; i++ ) {

      if ( data[i] <= k ) {
        p = true;
      } else {
        p = false;
        break;
      }
    }

    if (p) {
      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();
    boolean p = true;

    int m = Math.abs(a - b);
    int n = Math.abs(a - c);
    int l = Math.abs(a - d);
    int x = Math.abs(a - e);
    int y = Math.abs(b - c);
    int z = Math.abs(b - d);
    int q = Math.abs(b - e);
    int w = Math.abs(c - d);
    int r = Math.abs(c - e);
    int t = Math.abs(d - e);

    int data[] = { m , n , l , x , y , z , q , w , r , t };

    for (int i = 0 ; i < data.length ; i++ ) {

      if ( data[i] <= k ) {
        p = true;
      } else {
        p = false;
        break;
      }
    }

    if (p) {
      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 boolean p = true; p true int m = Math.abs(a - b); m Math.abs(a - b) Math.abs Math a - b a b int n = Math.abs(a - c); n Math.abs(a - c) Math.abs Math a - c a c int l = Math.abs(a - d); l Math.abs(a - d) Math.abs Math a - d a d int x = Math.abs(a - e); x Math.abs(a - e) Math.abs Math a - e a e int y = Math.abs(b - c); y Math.abs(b - c) Math.abs Math b - c b c int z = Math.abs(b - d); z Math.abs(b - d) Math.abs Math b - d b d int q = Math.abs(b - e); q Math.abs(b - e) Math.abs Math b - e b e int w = Math.abs(c - d); w Math.abs(c - d) Math.abs Math c - d c d int r = Math.abs(c - e); r Math.abs(c - e) Math.abs Math c - e c e int t = Math.abs(d - e); t Math.abs(d - e) Math.abs Math d - e d e int data[] = { m , n , l , x , y , z , q , w , r , t }; data { m , n , l , x , y , z , q , w , r , t } m n l x y z q w r t for (int i = 0 ; i < data.length ; i++ ) {

      if ( data[i] <= k ) {
        p = true;
      } else {
        p = false;
        break;
      }
    } int i = 0 ; int i = 0 ; i 0 i < data.length i data.length data data.length i++ i++ i {

      if ( data[i] <= k ) {
        p = true;
      } else {
        p = false;
        break;
      }
    } {

      if ( data[i] <= k ) {
        p = true;
      } else {
        p = false;
        break;
      }
    } if ( data[i] <= k ) {
        p = true;
      } else {
        p = false;
        break;
      } data[i] <= k data[i] data i k {
        p = true;
      } p = true p true {
        p = false;
        break;
      } p = false p false break; if (p) {
      System.out.println("Yay!");
    } else {
      System.out.println(":(");
    } p {
      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();
    boolean p = true;

    int m = Math.abs(a - b);
    int n = Math.abs(a - c);
    int l = Math.abs(a - d);
    int x = Math.abs(a - e);
    int y = Math.abs(b - c);
    int z = Math.abs(b - d);
    int q = Math.abs(b - e);
    int w = Math.abs(c - d);
    int r = Math.abs(c - e);
    int t = Math.abs(d - e);

    int data[] = { m , n , l , x , y , z , q , w , r , t };

    for (int i = 0 ; i < data.length ; i++ ) {

      if ( data[i] <= k ) {
        p = true;
      } else {
        p = false;
        break;
      }
    }

    if (p) {
      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();
    boolean p = true;

    int m = Math.abs(a - b);
    int n = Math.abs(a - c);
    int l = Math.abs(a - d);
    int x = Math.abs(a - e);
    int y = Math.abs(b - c);
    int z = Math.abs(b - d);
    int q = Math.abs(b - e);
    int w = Math.abs(c - d);
    int r = Math.abs(c - e);
    int t = Math.abs(d - e);

    int data[] = { m , n , l , x , y , z , q , w , r , t };

    for (int i = 0 ; i < data.length ; i++ ) {

      if ( data[i] <= k ) {
        p = true;
      } else {
        p = false;
        break;
      }
    }

    if (p) {
      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();
    boolean p = true;

    int m = Math.abs(a - b);
    int n = Math.abs(a - c);
    int l = Math.abs(a - d);
    int x = Math.abs(a - e);
    int y = Math.abs(b - c);
    int z = Math.abs(b - d);
    int q = Math.abs(b - e);
    int w = Math.abs(c - d);
    int r = Math.abs(c - e);
    int t = Math.abs(d - e);

    int data[] = { m , n , l , x , y , z , q , w , r , t };

    for (int i = 0 ; i < data.length ; i++ ) {

      if ( data[i] <= k ) {
        p = true;
      } else {
        p = false;
        break;
      }
    }

    if (p) {
      System.out.println("Yay!");
    } else {
      System.out.println(":(");
    }

  }
}
