Just to clarify the problem statement: the objective of this problem seems to be to determine the number of unique vowels used in the given string.
Correct output for Laboratory is 3.
Test for balanced parentheses
Back to basics 8 - Matrix Diagonals
Sum the Digits of a Number
BULLSEYE Part 3: Reference Problem 18 BULLSEYE
Put Two 1D matrices into one 1D matrix
Power The Product
BULLSEYE Part 2: Reference Problem 18 BULLSEYE
factor to number
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