Many programming languages provide the functionality of converting a string to uppercase or
lowercase. For example, upcase/downcase in Ruby, upper/lower in Python,
and toUpperCase/toLowerCase in Java/JavaScript, uppercase/lowercase in Kotlin.
Typically, these methods won't change the size of the string.
For example, in Ruby, str.upcase.downcase.size == str.size is true for most cases.
However, in some special cases, the length of the transformed string may be longer than the original. Can you find a string that satisfies these criteria?
For example, in Ruby, That means str.upcase.downcase.size > str.size
You should just set the value of STRANGE_STRING to meet the previous criteria.
Note: Meta programming is not allowed in this kata. So, the size of your solution is limited.