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.
Remove any row in which a NaN appears
Remove all the words that end with "ain"
Arrange Vector in descending order
Is this matrix orthogonal?
Put Two 1D matrices into one 1D matrix
Power The Product
BULLSEYE Part 2: Reference Problem 18 BULLSEYE
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