import os

f = open(os.path.dirname(__file__)+"/input.txt", "r")

tot = 0
tot2 = 0

priorities = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

rucksacks = f.read().splitlines()
f.close()

for data in rucksacks:
    left = data[:len(data)//2]
    right = data[len(data)//2:]
    common = ''.join(set(left) & set(right))
    tot += priorities.rfind(common)+1

print("First answer: " + str(tot))

start = 0
end = len(rucksacks)
step = 3
for i in range(start, end, step):
    three = rucksacks[i:i+step]
    common = ''.join(set(three[0]) & set(three[1]) & set(three[2]))
    tot2 += priorities.rfind(common)+1

print("Second answer: " + str(tot2))