import os

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

tot, tot2 = 0, 0

priorities = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"

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

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

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

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