How to perform 'Parallel Count Vowels' in SAS.
* Task: Parallel Count Vowels
* Language: SAS
%macro parallel_count_vowels()
* Implementation for Parallel Count Vowels
%let result = ...; * Initialize variable
* TODO: Implement core logic here
* Step 1: Prepare data
* Step 2: Process Parallel Count Vowels
%put("Done");
%mend;