#!/usr/bin/env python
# 2024 - Advent Of Code 4 - part 2

# file = 'input_example.txt'
file = 'input.txt'

# pylint: disable=consider-using-with
input_lines = [line.strip('\n') for line in open(file, encoding="utf-8")]

MAX_X = len(input_lines[0])
MAX_Y = len(input_lines)

# for line in input_lines:
#     print(f'{line}')

def find_xmas(grid, start_pos):
    x = start_pos[0]
    y = start_pos[1]

    if grid[y - 1][x - 1] == 'M' and grid[y - 1][x + 1] == 'M':
        if grid[y + 1][x - 1] == 'S' and grid[y + 1][x + 1] == 'S':
            return True

    if grid[y - 1][x - 1] == 'M' and grid[y + 1][x - 1] == 'M':
        if grid[y - 1][x + 1] == 'S' and grid[y + 1][x + 1] == 'S':
            return True

    if grid[y - 1][x + 1] == 'M' and grid[y + 1][x + 1] == 'M':
        if grid[y - 1][x - 1] == 'S' and grid[y + 1][x - 1] == 'S':
            return True

    if grid[y + 1][x - 1] == 'M' and grid[y + 1][x + 1] == 'M':
        if grid[y - 1][x - 1] == 'S' and grid[y - 1][x + 1] == 'S':
            return True

    return False

accum = 0
for pos_y in range(1, MAX_Y - 1):
    for pos_x in range(1, MAX_X - 1):
        if input_lines[pos_y][pos_x] == 'A':
            if find_xmas(input_lines, (pos_x, pos_y)):
                accum += 1

print(f'{accum=}')