def read_grid(filename):
    grid = []
    with open(filename, 'r') as file:
        for line in file:
            grid.append(list(line.strip()))
    return grid

# Function to check if a diagonal forms 'MAS' or 'SAM'
def check_diagonal(grid, x, y, dx, dy):
    rows = len(grid)
    cols = len(grid[0])
    letters = []
    for k in range(-1, 2):  # Positions: -1, 0, 1
        nx = x + dx * k
        ny = y + dy * k
        if 0 <= nx < rows and 0 <= ny < cols:
            letters.append(grid[nx][ny])
        else:
            return False  # Out of bounds
    word = ''.join(letters)
    return word == 'MAS' or word == 'SAM'

def count_xmas_patterns(grid):
    rows = len(grid)
    cols = len(grid[0])
    count = 0

    for x in range(1, rows - 1):
        for y in range(1, cols - 1):
            if grid[x][y] != 'A':
                continue
            diagonal1 = check_diagonal(grid, x, y, -1, -1)  # Top-left to bottom-right
            diagonal2 = check_diagonal(grid, x, y, -1, 1)   # Top-right to bottom-left

            if diagonal1 and diagonal2:
                count += 1

    return count

# Main execution
if __name__ == "__main__":
    grid = read_grid('input.txt')
    # grid = read_grid('example.txt')
    total_xmas = count_xmas_patterns(grid)
    print(total_xmas)