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.
Angle between two vectors
Generate a string like abbcccddddeeeee
Magic is simple (for beginners)
Relative ratio of "1" in binary number
Convert a Cell Array into an Array
ZigZag matrix with reflected format
Put Two 1D matrices into one 1D matrix
Diagonal & Anti-Diagonal Matrix: Easy
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