public static char convertScoreToChar(Integer score) throws ScoreNotDigitException {
		if (score == 0) {
			return IConstants.ZERO_LABEL;
		}

		if (score == 10) {
			return IConstants.STRIKE_LABEL;
		}

		String scoreString = score.toString();
		if(scoreString.length() != 1) {
			throw new ScoreNotDigitException();
		}
		return scoreString.charAt(0);
	}