let {
  // inputs go here
  // they should start with a $ and use alphanumeric characters only
  $firstName = "John"
  $lastName = "Smith"
  $age = 32
  $employed = true
  $jobName = "Postman"
}
in {
  // here is another comment
  name.first = $firstName
  name.last = $lastName
  name.full = "$firstName $lastName"
  age = $age

  employment = {
     employed = $employed
     name = $jobName
  }

  placeholder = null

  // invalid = not_valid
  // invalid.var = $not_valid

  employment.sinceYear = 2019

  parents.father.birthday = {
    year = 1970
    month = 2
    day = 3
  }

  gender = "M"

  favourites = [
    "blue"
    "fish"
    "egg"
    $jobName
    4.73753
    false
    {
        hello = "world"
        food.favourite = "egg"
        food.hated = "beef"
    }
  ]

  empty1 = {}
  empty2 = []

  negative.int = -34
  negative.float = -34.34
}