def scrabble_score(word):
    """
    Count up the score of a word in scrabble points.
    
    Args:
        word: the word to get the score of
    Returns:
        The score of the word in scrabble points

    Raises:
        KeyError: character is invalid
    """
    arr = {'a': 1,'b': 3,'c': 3,'d': 2,'e': 1,'f': 4,'g': 2,'h': 4,'i': 1,'j': 8,'k': 5,'l': 1,'m': 3,'n': 1,'o': 1,'p': 3,'q': 10,'r': 1,'s': 1,'t': 1,'u': 1,'v': 4,'w': 4,'x': 8,'y': 4,'z': 10}
    score = 0
    for i in list(word):
        score += arr[i]
    
    return score