Definitions
In mathematics, additive primes are prime numbers for which the sum of their decimal digits are also primes.



Task
Write a program to determine (and show here) all additive primes less than 500.

Optionally, show the number of additive primes.



Also see

   the OEIS entry:   A046704 additive primes.
   the prime-numbers entry:   additive primes.
   the geeks for geeks entry: additive prime number.
   the prime-numbers fandom: additive primes.


additives: select 2..500 'x -> and? prime? x prime? sum digits x
 
loop split.every:10 additives 'a ->
    print map a => [pad to :string & 4]
 
print ["\nFound" size additives "additive primes up to 500"]