Write a function is_adult, that takes an integer, age, and returns True if it is greater than or equal to 18, or False otherwise.
Write a function is_registered, that takes a string, code, and returns True if code is "ADMIN" or "USER", and False otherwise.
Write a function access, that takes an integer and a string, age and code,
and:
- It returns "No access" if age is less than 18 and code is not "ADMIN" or "USER"
- It returns "Partial" if age is greater than or equal to 18 or code is "ADMIN" or "USER"
- It returns "Full" if age is greater than or equal to 18 and code is "ADMIN" or "USER"
Restriction: You CANNOT use any relational operator inside this function's body
(<, >, !=, ...).