---
ch-1:
  - function: secretsanta
    arguments:
      - Mr. Wall
      - Mrs. Wall
      - Mr. Anwar
      - Mrs. Anwar
      - Mr. Conway
      - Mr. Cross
    result: true
  - arguments:
      - Mr. Wall
      - Mrs. Wall
      - Mr. Anwar
    result: true
ch-2:
  - function: mostfrequentletterpair
    arguments: abcdbca
    result: bc
  - arguments: cdeabeabfcdfabgcd
    result: ab