Capitalization is writing a word with its first letter as a capital letter. Your task is to capitalize the given word.

Note, that during capitalization all the letters except the first one remains unchanged.
A single line contains a non-empty word. This word consists of lowercase and uppercase English letters. The length of the word will not exceed 10<sup class="upper-index">3</sup>.
def cap(word):    
    lists = list(word)
    for space in range(len(lists)):
        if lists[space] == " ":
            lists[space + 1] = lists[space + 1].upper()
    lists[0]  = lists[0].upper()
    return lists