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 all the words that end with "ain"
The Goldbach Conjecture
Remove the air bubbles
Matrix to column conversion
Area of a circle
BULLSEYE Part 2: Reference Problem 18 BULLSEYE
BULLSEYE Part 3: Reference Problem 18 BULLSEYE
Diagonal & Anti-Diagonal Matrix: Easy
factor to number
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