def solve(s):
    return s.upper() if len([i for i in s if i.isupper()]) > len(s)//2 else s.lower()

'''
In this Kata, you will be given a string that may have mixed uppercase and lowercase
letters and your task is to convert that string to either lowercase only
or uppercase only based on:

    make as few changes as possible.
    if the string contains equal number of uppercase and lowercase letters,
    convert the string to lowercase.

For example:

solve("coDe") = "code". Lowercase characters > uppercase. Change only the "D" to lowercase.
solve("CODe") = "CODE". Uppercase characters > lowecase. Change only the "e" to uppercase.
solve("coDE") = "code". Upper == lowercase. Change all to lowercase.
'''
