# Task
Given an initial string `s`, switch case of the minimal possible number of letters to make the whole string written in the upper case or in the lower case.
# Input/Output
`[input]` string `s`
String of odd length consisting of English letters.
3 ≤ inputString.length ≤ 99.
`[output]` a string
The resulting string.
# Example
For `s = "Aba"`, the output should be `"aba"`
For `s = "ABa"`, the output should be `"ABA"`
def case_unification(s):
    lower = sum(c.islower() for c in s)
    upper = len(s) - lower
    func = str.upper if upper > lower else str.lower
    return func(s)
def case_unification(s):
    lower = sum(c.islower() for c in s)
    upper = len(s) - lower
    func = str.upper if upper > lower else str.lower
    return func(s)