en:
  faker:
    blood:
      type:
        - O
        - A
        - B
        - AB
      rh_factor:
        - '+'
        - '-'
      group:
        - "#{type}#{rh_factor}"

Faker().blood.type() // => O
Faker().blood.rhFactor() // => +
Faker().blood.group() // => O+