function definePointPosition(array) {
    for (let i = 0; i < array.length; i += 3) {
        let [x,y,z] = ([array[i], array[i+1], array[i+2]]);

        if (x >= 10 && x <= 50) {
            if (y >= 20 && y <= 80) {
                if (z >= 15 && z <= 50) {
                    console.log("inside");
                }
            }
        } else {
            console.log("outside");
        }
    }
}