const readline = require('readline');
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

function isValidPosition(x, y) {
    $pass = 1 <= x <= 8 && 1 <= y <= 8;

    if (x == '' || y == '' || !$pass) {
        return false;
    }

    return true;
}

function blackOrWhite(x, y) {
    if ((x % 2 == 0 && y % 2 == 0) || (x % 2 != 0 && y % 2 != 0)) {
        return 'black';
    }

    return 'white';
}

function findKnightNextMove(x, y) {
    const next = [];
    const curColor = blackOrWhite(x, y);

    // Lap qua cac vi tri xung quanh con ma trong vong ban kinh 2 o
    for (let i = x - 2; i <= x + 2; i++) {
        for (let j = y - 2; j <= y + 2; j++) {
            // giong voi vi tri hien tai cua con ma
            const isCurPos = x == i && y == j;
            // trong vong ban kinh 1 o
            let isRadiusLTE1 = false;

            if ((x - i === 1 || x === i || i - x === 1) && (y - j === 1 || y === j || j - y === 1)) {
                isRadiusLTE1 = true;
            }

            if (!isValidPosition(i, j) || isCurPos || isRadiusLTE1) {
                continue;
            }

            if (blackOrWhite(i, j) != curColor) {
                next.push(`${i}|${j}`);
            }
        }
    }

    return next;
}

function ham() {
    rl.question('Nhap vi tri truc X ', function (A) {
        rl.question('Nhap vi tri truc y ', function (B) {
            A = +A;
            B = +B;

            if (!isValidPosition(A, B)) {
                console.log('Vi tri khong hop le');
                ham();
                return;
            }

            console.log('Cac vi tri con ma duoc di la: ', findKnightNextMove(A, B));
            rl.close();
        });
    });
}

ham();