def mysplit(string):
    words = []
    word = ""
    for char in string:
        if char != " ":
            word += char
        else:
            if word:
                words.append(word)
                word = ""
    if word:
        words.append(word)
    return words


print(mysplit("To be or not to be, that is the question"))
print(mysplit("To be or not to be,that is the question"))
print(mysplit("   "))
print(mysplit(" abc "))
print(mysplit(""))