Special Number
  [ASSIGNMENT]:
        Special Number
A number is a Special Number if it’s digits 
only consist 0, 1, 2, 3, 4 or 5.
TASK:
Given a number determine if it special 
number or not.

NOTE!
- The number passed will be positive (N > 0).

- All single-digit numbers with in the 
  interval [0:5] are considered as special 
  number.
  Input >> Output Examples::
Example #1
     specialNumber(2) --> return "Special!:)"
Explanation:
It's a single-digit number
within the interval [0:5].


Example #2
     specialNumber(9) --> return "NOT!!"
Explanation:
Although, it's a single-digit number 
but outside the interval [0:5].


Example #3
     specialNumber(23) --> return "Special!:)"
Explanation:
All the number's digits formed from
the interval [0:5] digits.


Example #4
     specialNumber(39) --> return "NOT!!"
Explanation:
Although, there is a digit (3) within the 
interval but the second digit is not 
(must be ALL the number's digits).


Example #5
     specialNumber(59) --> return "NOT!!"
Explanation:
Although, there is a digit (5) within the 
interval but the second digit is not 
(must be ALL the number's digits).


Example #6
     specialNumber(513) --> return "Special!:)"
Example #7
     specialNumber(709) --> return "NOT!!"


    HappyCodings!:) by @boolean maybe
Special Number [TASK]
