import itertools
import re

def press_buttons(buttons, lights):

        for button in buttons:
             for light in button:

                if lights[int(light)] == ".":
                    lights[int(light)] = "#"
                else:
                    lights[int(light)] = "."

        return "".join(lights)


def read_input(filename):
    manuals = []
    for line in open(filename).read().splitlines():

        lights = re.findall(r"\[(.*?)\]",line)[0]
        buttons = re.findall(r"\((.*?)\)",line)

        buttons = [ b.split(",") for b in buttons ]

        manuals.append((lights,buttons))
    return manuals


# filename = "day10/example_input" # 7
filename = "day10/input" # 419

manuals = read_input(filename)

buttons_pressed = []
for manual in manuals:
    presses = 0

    target_lights = manual[0]
    continueSearch = True
    while continueSearch:
        presses += 1
        for buttons in itertools.combinations(manual[1],presses):

            lights = press_buttons(buttons, ["."] * len(target_lights))

            if lights == target_lights:
                buttons_pressed.append(len(buttons))
                continueSearch = False
                break

sum_buttons = 0
for butt in buttons_pressed:
    sum_buttons += butt


print(f"Sum of fewest buttons: {sum_buttons}")