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.
Back to basics 8 - Matrix Diagonals
Min of a Matrix
union without repitition
Sum of odd numbers in a matrix
index of n^2 in magic(n)
Alternately upper-lower case
interesting center of magic matrix
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