#!/usr/bin/env python3

with open('input.txt', 'r') as f:
    package_ids = [x.strip() for x in f.readlines()]

# print(package_ids)

count_doubles = 0
count_tripples = 0

for el in package_ids:
    is_double = False
    is_tripple = False

    for my_char in set(el):
        count = el.count(my_char)
        if count == 2:
            is_double = True
        if count == 3:
            is_tripple = True 
        
    if is_double:
        count_doubles += 1
    if is_tripple:
        count_tripples += 1
    
print('Entries:', len(package_ids))
print('Doubles:', count_doubles)
print('Tripples:', count_tripples)
print('-' * 40)
print('Checksum:', count_doubles * count_tripples)