class User {
  constructor(firstName, lastName) {
    this.firstName = firstName;
    this.lastName = lastName;
  }

  getFullName() {
    console.log(this.firstName + " " + this.lastName);
  }
}

class Aluno extends User {
  constructor(firstName, lastName, turma) {
    super(firstName, lastName);
    this.turma = turma;
  }
}

const aluno = new Aluno("Caio", "de Lima Granero", "014")
console.log(aluno.getFullName()); // "Caio de Lima Granero"