fun FishError(message) {
  return HogError('FishError', message)
}
fun FoodError(message) {
  return HogError('FoodError', message)
}

try {
  throw FishError('You forgot to feed your fish')
} catch (e: FoodError) {
  print(f'Problem with your food: {e.message}')
} catch (e: FishError) {
  print(f'Problem with your fish: {e.message}')
}

try {
  throw FoodError('Your fish are hungry')
} catch (e: FoodError) {
  print(f'Problem with your food: {e.message}')
} catch (e: FishError) {
  print(f'Problem with your fish: {e.message}')
}

try {
  throw NotImplementedError('Your fish are hungry')
} catch (e: FoodError) {
  print(f'Problem with your food: {e.message}')
} catch {
  print(f'Unknown problem: {e}')
}