# Читаем инпут и создаем масив состоящий из списков в списке
# Х это первы список и "вертикалб"
# У это подсписок с "горизонталь"
input = """..@@.@@@@.
@@@.@.@.@@
@@@@@.@.@@
@.@@@@..@.
@@.@@@@.@@
.@@@@@@@.@
.@.@.@.@@@
@.@@@.@@@@
.@@@@@@@@.
@.@.@@@.@."""

with open("input.txt", "r") as file:
    input = file.read()

karta = []
for row in input.splitlines():
    karta.append(list(map(str, row.strip())))

for row in karta:
    print("".join(row))


# проверка существования поля
def fild_exist(x: int, y: int):

    if x < 0 or x > len(karta) - 1:
        return False
    elif y < 0 or y > len(karta[x]) - 1:
        return False
    else:
        return True


# Функция проверки
def cheker(x: int, y: int):
    roll_count = 0
    filds_to_check = 9
    # print(f"cheker for {x} {y}")
    # print(f"roll_count {roll_count}\nfilds_to_check {filds_to_check}")
    while (int(roll_count) >= 4) is False or (filds_to_check <= 0) is False:
        # print(f"Предположительные координаты для range: x {list(range(x - 1,x + 2))}, y {list(range(y - 1, y +2))}")
        for n_x in list(range(x - 1, x + 2)):
            for n_y in list(range(y - 1, y + 2)):
                # print(f"Существует поле {n_x} {n_y}? {fild_exist(n_x,n_y)}")
                if fild_exist(n_x, n_y):
                    if karta[n_x][n_y] != "." and not (n_x == x and n_y == y):
                        roll_count += 1
                        filds_to_check -= 1
                        # print(f"ADD +1 to roll_count\nroll_count {roll_count}\nfilds_to_check {filds_to_check}")
                    elif n_x == x and n_y == y:
                        # print(f"Do not self chek!!!\nroll_count {roll_count}\nfilds_to_check {filds_to_check}")
                        filds_to_check -= 1
                    else:
                        # print(f"field has a .\nroll_count {roll_count}\nfilds_to_check {filds_to_check}")
                        filds_to_check -= 1
                else:
                    # print(f"FIeld dos'n exist\nroll_count {roll_count}\nfilds_to_check {filds_to_check}")
                    filds_to_check -= 1
        # print("FINAL roll_count =",roll_count)
        # print(filds_to_check <= 0)
        # print("="*100)
        return roll_count


# Основное тело
def reducer():
    result = 0
    print("*" * (len(karta[0])), " Начало reducer")
    for row in karta:
        print("".join(row))
    for x, val_x in enumerate(karta):
        for y, val_y in enumerate(karta[x]):
            # print(f"проверяем координаты: x={x}, y={y}")
            if karta[x][y] != ".":
                if cheker(x, y) < 4:
                    karta[x][y] = "x"
                    result += 1
                    # print(f"cheker for {x} {y} is {cheker(x,y)}")
                else:
                    pass
            else:
                pass
    print("*" * (len(karta[0])), " Конец reducer")
    for row in karta:
        print("".join(row))
    return result


old_result = 0
new_result = reducer()
all_result = new_result
print(f"new_result: {new_result}")
print("-" * (len(karta[0])), "НАЧАЛО While")
while new_result != 0:
    old_result = new_result
    for row in karta:
        for i, r in enumerate(row):
            row[i] = r.replace("x", ".")
    for row in karta:
        print("".join(row))
    print("-" * (len(karta[0])), " После замены x на .")

    new_result = reducer()
    print(f"Remove {abs(new_result - old_result)} roll of paper\n")
    print(f"old_result: {old_result} new_result: {new_result}")
    all_result += new_result


print("=" * (len(karta[0])))
for row in karta:
    print("".join(row))
print("Result", all_result)