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.
Connect Four Win Checker
Angle between two vectors
Calculate the area of a triangle between three points
Alternately upper-lower case
Find the dimensions of a matrix
index of n^2 in magic(n)
Sum of odd numbers in a matrix
interesting center of magic matrix
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