# Answer
# define function to get sum of priorities
def get_priority_sum(input):
# create an empty dict to store item types and priorities
item_types = {}
# loop through each line in the input
for line in input:
# get the first half of the line, which is the first compartment
first_compartment = line[:len(line)//2]
# get the second half of the line, which is the second compartment
second_compartment = line[len(line)//2:]
# loop through each character in the first compartment
for c in first_compartment:
# if the character is uppercase, add the priority to the dict
if c.isupper():
item_types[c] = ord(c) - ord('A') + 27
# if the character is lowercase, add the priority to the dict
elif c.islower():
item_types[c] = ord(c) - ord('a') + 1
# loop through each character in the second compartment
for c in second_compartment:
# if the character is uppercase, add the priority to the dict
if c.isupper():
item_types[c] = ord(c) - ord('A') + 27
# if the character is lowercase, add the priority to the dict
elif c.islower():
item_types[c] = ord(c) - ord('a') + 1
# get the sum of all the priorities
priority_sum = 0
for k,v in item_types.items():
priority_sum += v
# return the sum
return priority_sum
# test input
input = ["vJrwpWtwJgWrhcsFMMfFFhFp",
"jqHRNqRjqzjGDLGLrsFMfFZSrLrFZsSL",
"PmmdzqPrVvPwwTWBwg",
"wMqvLMZHhHMvwLHjbvcjnnSBnvTQFn",
"ttgJtRGJQctTZtZT",
"CrZsJsPPZsGzwwsLwLmpwMDw"]
print(get_priority_sum(input))
# Output: 157
