---
ch-1:
  - function: threepower
    arguments: 27
    result: true
  - arguments: 0
    result: false
  - arguments: 6
    result: false
ch-2:
  - function: reversevowels
    arguments: Raku
    result: Ruka
  - arguments: Perl
    result: Perl
  - arguments: Julia
    result: Jaliu
  - arguments: Uiua
    result: Auiu