Problem:
﻿Score: 100 points

Problem Statement

In AtCoder city, there are five antennas standing in a straight line. They are called Antenna A, B, C, D and E from west to east, and their coordinates are a, b, c, d and e, respectively.

Two antennas can communicate directly if the distance between them is k or less, and they cannot if the distance is greater than k.

Determine if there exists a pair of antennas that cannot communicate directly.

Here, assume that the distance between two antennas at coordinates p and q (p < q) is q - p.

Constraints

a, b, c, d, e and k are integers between 0 and 123 (inclusive).

a < b < c < d < e

Input

Input is given from Standard Input in the following format:

a
b
c
d
e
k

Output

Print :( if there exists a pair of antennas that cannot communicate directly, and print Yay! if there is no such pair.

Sample Input 1

1
2
4
8
9
15

Sample Output 1

Yay!

In this case, there is no pair of antennas that cannot communicate directly, because:

the distance between A and B is 2 - 1 = 1

the distance between A and C is 4 - 1 = 3

the distance between A and D is 8 - 1 = 7

the distance between A and E is 9 - 1 = 8

the distance between B and C is 4 - 2 = 2

the distance between B and D is 8 - 2 = 6

the distance between B and E is 9 - 2 = 7

the distance between C and D is 8 - 4 = 4

the distance between C and E is 9 - 4 = 5

the distance between D and E is 9 - 8 = 1

and none of them is greater than 15. Thus, the correct output is Yay!.

Sample Input 2

15
18
26
35
36
18

Sample Output 2

:(

In this case, the distance between antennas A and D is 35 - 15 = 20 and exceeds 18, so they cannot communicate directly.
Thus, the correct output is :(.

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Accepted)

import java.util.*;
import java.util.stream.*;
import java.util.function.*;

public class Main {
    public static void main(String[] args) throws Exception {
        System.out.println(new Main().solve());
    }
    
    // パラメタ渡しもちゃんとクラス作るのも面倒なので手抜き
    // 必要な値はここで全部取ってしまう
    Scanner sc = new Scanner(System.in);
    // int n = Integer.parseInt(sc.next());
    // {sc.nextLine();}
    int[] a = IntStream.range(0, 5).map(i -> Integer.parseInt(sc.next())).toArray();
    int k =  Integer.parseInt(sc.next());
    String solve() {
        for(int i : a) {
            for(int j : a) {
                if(i - j > k) {
                    return ":(";
                }
            }
        }
        return "Yay!";
    }
    
}
// public class Main {
//     public static void main(String[] args) throws Exception {
//         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();
        
//         IntStream.of(a, b, c, d, e).
//         int k = sc.nextInt();
//         System.out.println();
//     }
    
//     // // パラメタ渡しもちゃんとクラス作るのも面倒なので手抜き
//     // // 必要な値はここで全部取ってしまう
//     // Scanner sc = new Scanner(System.in);
//     // int n = Integer.parseInt(sc.next());
//     // {sc.nextLine();}
//     // int[] a = IntStream.range(0, n).map(i -> Integer.parseInt(sc.next())).toArray();
    
//     // String solve() {
//     //     return n + "" + Arrays.toString(a);
//     // }
    
// }