Discussion on: AoC Day 2: Inventory Management System

from collections import Counter

with open("input.txt") as f:
    ids = [Counter(l.strip()) for l in f]

count2 = 0
count3 = 0
for c in ids:
    if 2 in c.values(): count2 += 1
    if 3 in c.values(): count3 += 1

print(count2 * count3)

from editdistance import eval as dist
from itertools import product

with open("input.txt") as f:
    ids = [l.strip() for l in f]

for a, b in product(ids, ids):
    d = dist(a, b)
    if d == 1:
        print(a, b)
        break