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.
Sum the elements in either diagonal of a square matrix
04 - Scalar Equations 2
Count decimal digits of a number
Sum of diagonals elements of a matrix
union without repitition
index of n^2 in magic(n)
Sum of odd numbers in a matrix
Alternately upper-lower case
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