Obtain the most frequent character.
If there is a tie between letters, return the first result alphabetically.
Additional test cases have been added.
Verify you 7th Test Suite.
Find all elements less than 0 or greater than 10 and replace them with NaN
Distance walked 2D
The sum of the numbers in the vector
Calculate the Number of Sign Changes in a Row Vector (No Element Is Zero)
Find the index of n in magic(n)
execute the declaration in strings and return value
interesting center of magic matrix
Sum of odd numbers in a matrix
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