/*
Description:
Definition
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 .

Warm-up (Highly recommended)
Playing With Numbers Series
Notes
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
1-  specialNumber(2) ==> return "Special!!"
Explanation:
It's a single-digit number within the interval [0:5] .

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

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

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 ) .

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 ) .

6- specialNumber(513) ==> return "Special!!"
7- specialNumber(709) ==> return "NOT!!"
*/

function specialNumber(n){
  return /[6-9]/.test(n)?"NOT!!":"Special!!"
}
