const fs = require('fs');

let input = fs.readFileSync(__dirname + '/input.txt', 'utf8');

const vertical: Array<string> = input.split("\n");
const width = vertical[0].length;
const height = vertical.length;

let result = 0;

for (let j = 1; j < height - 1; j++) {
    for (let i = 1; i < width - 1; i++) {
        const letter = vertical[i][j];
        if (letter !== 'A') {
            continue;
        }
        const diagonalRight = vertical[i-1][j-1] + 'A' + vertical[i+1][j+1];
        const diagonalLeft = vertical[i-1][j+1] + 'A' + vertical[i+1][j-1];
        if (
            (diagonalLeft === 'MAS' || diagonalLeft === 'SAM')
            && (diagonalRight === 'MAS' || diagonalRight === 'SAM')
        ) {
            result++;
        }
    }
};

console.log(result);