Please remove excess space, limit one space between others, and no space before punctuation marks.
Additional test cases were provided.
Word Counting and Indexing
Least common multiple of many numbers
Replace May with April
Multiply a column by a row
Basics: 'Find the eigenvalues of given matrix
How to subtract?
Check if sorted
Vectorizing, too easy or too hard?
Acidity of vinegar and salts
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