Given a List of words, return the words that can be typed using letters of alphabet on only one row's of American keyboard. For example: Input: Hello, Alaska, Dad, Peace Output: Alaska, Dad Reference: https:leetcode.comproblemskeyboardrowdescription :type words: Liststr :rtype: Liststr
def find_keyboard_row(words):
    """
    :type words: List[str]
    :rtype: List[str]
    """
    keyboard = [
        set('qwertyuiop'),
        set('asdfghjkl'),
        set('zxcvbnm'),
    ]
    result = []
    for word in words:
        for key in keyboard:
            if set(word.lower()).issubset(key):
                result.append(word)
    return result
