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.
Make a checkerboard matrix
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Magic is simple (for beginners)
Element by element multiplication of two vectors
length of a vector
~~~~~~~ WAVE ~~~~~~~~~
ZigZag matrix with reflected format
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