---
ch-1:
  - function: commoncharacters
    arguments:
      - Perl
      - Rust
      - Raku
    result:
      - r
  - arguments:
      - love
      - live
      - leave
    result:
      - e
      - l
      - v
ch-2:
  - function: squareful
    arguments:
      - 1
      - 17
      - 8
    result:
      - - 1
        - 8
        - 17
      - - 17
        - 8
        - 1
  - arguments:
      - 2
      - 2
      - 2
    result:
      - - 2
        - 2
        - 2