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.
The Goldbach Conjecture, Part 2
Test for balanced parentheses
calculate linear convolution two vectors
ZigZag matrix with reflected format
Put Two 1D matrices into one 1D matrix
factor to number
Reverse CHECKBOX MATRIX with 69
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