---
ch-1:
  - function: uncommonwords
    multiarg: true
    arguments:
      - Mango is sweet
      - Mango is sour
    result:
      - sweet
      - sour
  - multiarg: true
    arguments:
      - Mango Mango
      - Orange
    result:
      - Orange
  - function: uncommonwords
    multiarg: true
    arguments:
      - Mango is Mango
      - Orange is Orange
    result: []
ch-2:
  - function: xmatrix
    arguments:
      - - 1
        - 0
        - 0
        - 2
      - - 0
        - 3
        - 4
        - 0
      - - 0
        - 5
        - 6
        - 0
      - - 7
        - 0
        - 0
        - 1
    result: true
  - arguments:
      - - 1
        - 2
        - 3
      - - 4
        - 5
        - 6
      - - 7
        - 8
        - 9
    result: false
  - arguments:
      - - 1
        - 0
        - 2
      - - 0
        - 3
        - 0
      - - 4
        - 0
        - 5
    result: true