class a {
    x: string = "ola";

    constructor() {
        console.log('1');
    }
    main() {
        console.log('2');
        this.x = "adeus";
    }
}

class b extends a {
    constructor() {
        super();
        console.log('3');
    }
    main() {
        console.log('4');
        this.x = "adeus";
    }

    teste() {
        this.x = "new";
    }
}