from pprint import pprint

with open('input.txt', 'r') as f:
    raw = [x.strip() for x in f.readlines()]
    initial_state = raw[0].split(' ')[-1]
    rules = dict()
    for rule in raw[2:]:
        x, y = rule.split(' => ')
        rules[x] = y
    
print(initial_state)
pprint(rules)

gens = 20

state = '..' * gens + initial_state + '..' * gens
print(state)
for _ in range(gens):
    next = ['.', '.']
    for i in range(2, len(state) - 2):
        seq = state[i-2:i+3]
        next.append(rules.get(seq) or '.')
    next.append('.')
    next.append('.')
    state = ''.join(next)
    print(state.strip('.'))

res = 0
for i, pot_val in enumerate(state):
    pot_id = i - gens * 2
    if pot_val == '#':
        res += pot_id
print(res)