import os
from collections import Counter

def tick(currentLanturnFish):
    new_fish_to_spawn = 0

    new_fish = Counter()
    new_fish_to_spawn = currentLanturnFish['0']
    new_fish['0'] = currentLanturnFish['1']
    new_fish['1'] = currentLanturnFish['2']
    new_fish['2'] = currentLanturnFish['3']
    new_fish['3'] = currentLanturnFish['4']
    new_fish['4'] = currentLanturnFish['5']
    new_fish['5'] = currentLanturnFish['6'] 
    new_fish['6'] = currentLanturnFish['7'] + new_fish_to_spawn
    new_fish['7'] = currentLanturnFish['8']
    new_fish['8'] = new_fish_to_spawn

    return new_fish

dir = os.path.dirname(os.path.abspath(__file__))

with open(os.path.join(dir, './input.txt'), 'r') as input_file:

    lines = input_file.readlines()

    line = lines[0].strip()
    parts = line.split(',')

    fish = Counter(parts)
    print(fish)

    days_to_predict = 256
    for x in range(days_to_predict):
        fish = tick(fish)
    print(sum(fish.values()))