function Person (name, age, job) {
  this.name = name;
  this.age = age;
  this.job = job;
}
 
Person.prototype.getAgeAndName = function () {
  return this.age + ' ' + this.name;
}
 
Person.older = function (person1, person2) {
  return person1.age >= person2.age ? person1 : person2;
}
 
const seo = new Person('SDS', 30, 'Programmer');
const ahn = new Person('AHY', 28, 'Staff');
 
console.log(seo.getAgeAndName());
console.log(Person.older(seo, ahn));