Halloween Monsters Halloween Monsters

You have to call the monsters from another world in preparation for Halloween.

You are given a string as an input value. You have to use it to make monster names and return the maximum number. You can call only 9 kinds of monsters:

  • frankenstein
  • ghost
  • jack
  • mummy
  • skeleton
  • vampire
  • werewolf
  • witch
  • zombie
  • You can make multiple monster names of the same kind.
  • You don't need to use all the characters.
  • If you can't make a monster name, return 0.


halloween_monsters('tkjagchso') == 2               # jack, ghost
halloween_monsters('finhtiistchwwaerecnnkt') == 3  # witch, witch, frankenstein

Input: The spell (a string).

Output: A number of monsters (an integer).


  • all(re.fullmatch('[a-z]', i) for i in input)
  • len(input) ≤ 100

How it is used: To calculate materials and products.

CheckiO Extensions

CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.

In order to install CheckiO client you'll need installed Python (version at least 3.8)

Install CheckiO Client first:

pip3 install checkio_client

Configure your tool

checkio --domain=py config --key=

Sync solutions into your local folder

checkio sync

(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)

checkio serv -d

Alternatevly, you can install Chrome extension or FF addon

checkio install-plugin
checkio install-plugin --ff
checkio install-plugin --chromium

Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.

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