Adjacent Letters

Adjacent Letters


You are given a string, where all letters are of same case. This string could include adjacent letters - two the same letters together ("aa", "bb" etc). Your task in this mission is to remove both these letters. If after removing one pair a new appears - remove it as well! Each such pair should be removed from string until no one remains. Good luck!

Input: String (str).

Output: String (str).


assert adjacent_letters("adjacent_letters") == "adjacent_lrs"
assert adjacent_letters("") == ""
assert adjacent_letters("aaa") == "a"
assert adjacent_letters("ABBA") == ""
Invalid hot key. Each hot key should be unique and valid
Hot keys:
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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