Additional test cases have been added.
nice internal reference to the match.
a simple improvement could be to parse "s" as input and write "lower($0(2:..." in the replacement string.
two steps in one op, nicely done!
Compute a dot product of two vectors x and y
Count up then down
MATCH THE STRINGS (2 CHAR) very easy
Back to Basics - Find no. of elements in a matrix?
Triangle of numbers
How many unique Pythagorean triples?
Product of Each Column
Find the starting index of a consecutive condition
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