Contest: Task: Related: TaskB

Score: $100$ points

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 $q - p$.

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

Input is given from Standard Input in the following format:

$a$ $b$ $c$ $d$ $e$ $k$

Print `:(`

if there exists a pair of antennas that cannot communicate **directly**, and print `Yay!`

if there is no such pair.

1 2 4 8 9 15

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!`

.

15 18 26 35 36 18

:(

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 `:(`

.