with open('puzzle.txt', 'r') as f:
    lines = f.read().splitlines()

xmas = 0

for y in range(len(lines)):
    for x in range(len(lines[y])):
        if lines[y][x] == 'A':
            extra_check = []

            if 0 < x < len(lines[y]) - 1 and 0 < y < len(lines) - 1:
                if (lines[y - 1][x - 1] == 'M' and lines[y - 1][x + 1] == 'S' and
                        lines[y + 1][x - 1] == 'M' and lines[y + 1][x + 1] == 'S'):
                    xmas += 1

                if (lines[y - 1][x - 1] == 'M' and lines[y - 1][x + 1] == 'M' and
                        lines[y + 1][x - 1] == 'S' and lines[y + 1][x + 1] == 'S'):
                    xmas += 1

                if (lines[y - 1][x - 1] == 'S' and lines[y - 1][x + 1] == 'M' and
                        lines[y + 1][x - 1] == 'S' and lines[y + 1][x + 1] == 'M'):
                    xmas += 1

                if (lines[y - 1][x - 1] == 'S' and lines[y - 1][x + 1] == 'S' and
                        lines[y + 1][x - 1] == 'M' and lines[y + 1][x + 1] == 'M'):
                    xmas += 1

print(xmas)