Problem:
Score: 100 points

Problem Statement

E869120's and square1001's 16-th birthday is coming soon.

Takahashi from AtCoder Kingdom gave them a round cake cut into 16 equal fan-shaped pieces.

E869120 and square1001 were just about to eat A and B of those pieces, respectively,

when they found a note attached to the cake saying that "the same person should not take two adjacent pieces of cake".

Can both of them obey the instruction in the note and take desired numbers of pieces of cake?

Constraints

A and B are integers between 1 and 16 (inclusive).

A+B is at most 16.

Input

Input is given from Standard Input in the following format:

A B

Output

If both E869120 and square1001 can obey the instruction in the note and take desired numbers of pieces of cake, print Yay!; otherwise, print :(.

Sample Input 1

5 4

Sample Output 1

Yay!

Both of them can take desired number of pieces as follows:

Sample Input 2

8 8

Sample Output 2

Yay!

Both of them can take desired number of pieces as follows:

Sample Input 3

11 4

Sample Output 3

:(

In this case, there is no way for them to take desired number of pieces, unfortunately.

Solution in Ruby (2.3.3) (judge verdict: Accepted)

def haveCakes(cakes1, cakes2)
  if cakesNormalize(cakes1, cakes2) then
    if cakesHerf(cakes1, cakes2) then
      puts POSSIBLE
    else
      puts ERROR
    end
  else
    puts ERROR
  end
end

def cakesHerf(cakes1, cakes2)
  if cakes1 <= CAKEHARF && cakes2 <= CAKEHARF then
    return true
  else
    return false
  end
end

def cakesNormalize(cakes1, cakes2)
  if cakes1 < 0 && cakes1 > CAKEMAX && cakes2 < 0 && cakes2 > CAKEMAX 
    return false
  end
  if cakes1+cakes2 <= CAKEMAX then
    return true
  else return false
  end
end

input = gets
arr = input.split(" ")

CAKEMAX = 16
CAKEHARF = 8

POSSIBLE = "Yay!"
ERROR = ":("

cakes1 = arr[0].to_i
cakes2 = arr[1].to_i

haveCakes(cakes1, cakes2)