I have the `par` value for each hole on a golf course and my stroke `score` on each hole. I have them stored as strings, because I wrote them down on a sheet of paper.  Right now, I'm using those strings to calculate my golf score by hand: take the difference between my actual `score` and the `par` of the hole, and add up the results for all 18 holes.

For example:
* If I took 7 shots on a hole where the par was 5, my score would be: 7 - 5 = 2
* If I got a hole-in-one where the par was 4, my score would be: 1 - 4 = -3.

Doing all this math by hand is really hard! Can you help make my life easier?


## Task Overview

Complete the function which accepts two strings and calculates the golf score of a game. Both strings will be of length 18, and each character in the string will be a number between 1 and 9 inclusive.

Difficulty: EASY
Starter code: def golf_score_calculator(par_string, score_string):
	

Solutions:
def golf_score_calculator(par, score):
	return sum((int(b) - int(a) for (a, b) in zip(par, score)))


def golf_score_calculator(p, s):
	return sum([int(s[i]) - int(p[i]) for i in range(len(p))])


def golf_score_calculator(par, score):
	return sum(map(int, score)) - sum(map(int, par))


def golf_score_calculator(*par_score):
	return sum((int(b) - int(a) for (a, b) in zip(*par_score)))


def golf_score_calculator(par_string, score_string):
	return sum(map(int, list(score_string))) - sum(map(int, list(par_string)))


def digitsum(x):
	total = 0
	for letter in str(x):
		total += ord(letter) - 48
	return total

def golf_score_calculator(par, score):
	return digitsum(score) - digitsum(par)


def golf_score_calculator(par_string, score_string):
	score = 0
	for i in range(0, 18):
		score -= int(par_string[i]) - int(score_string[i])
	return score


def golf_score_calculator(par_string, score_string):
	par_list = list(map(int, par_string))
	score_list = list(map(int, score_string))
	differences = [i - j for (i, j) in zip(score_list, par_list)]
	return sum(differences)
	pass


def golf_score_calculator(par_stg, score_stg):
	return sum((int(s) - int(p) for (s, p) in zip(score_stg, par_stg)))


def golf_score_calculator(par_string, score_string):
	return sum((b - a for (a, b) in zip(map(int, par_string), map(int, score_string))))