Additional test cases have been added.
Alphabetize by last name
Get the area codes from a list of phone numbers
Project Euler: Problem 6, Natural numbers, squares and sums.
Angle between two vectors
Generate a string like abbcccddddeeeee
Cody Computer Part 3 - Detect the graphic card used on Cody Computer
Join Strings with Multiple Different Delimiters
Return unique values without sorting
Cody Computer Part 2 - Get the license number of Cody Computer
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