Exercise from code_wars

Title Case

def title_case(title, minor_words=''):
    
    """Write a function that will convert a string into title case, given an optional list of exceptions (minor 
    words). The list of minor words will be given as a string with each word separated by a space. Your function 
    should ignore the case of the minor words string -- it should behave in the same way even if the case of the 
    minor word string is changed. """
    
    words = []
    minor_words = minor_words.lower().split()
    for word in title.lower().split():
        if word in minor_words:
            words.append(minor_words[minor_words.index(word)])
            words[0] = words[0].capitalize()
        else:
            words.append(word.capitalize())
    return ' '.join(words)