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Contest: Task: Related: TaskB

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 qp.

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 21 = 1
  • the distance between A and C is 41 = 3
  • the distance between A and D is 81 = 7
  • the distance between A and E is 91 = 8
  • the distance between B and C is 42 = 2
  • the distance between B and D is 82 = 6
  • the distance between B and E is 92 = 7
  • the distance between C and D is 84 = 4
  • the distance between C and E is 94 = 5
  • the distance between D and E is 98 = 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 3515 = 20 and exceeds 18, so they cannot communicate directly. Thus, the correct output is :(.

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