class Person {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }

  tellMyName() {
    return `I am ${this.name}`;
  }

  tellMyAge() {
    return `I am ${this.age}`;
  }
}


const john = new Person('John', 40);
const mary = new Person('Mary', 35);

john.tellMyName();
john.tellMyAge();

mary.tellMyName();
mary.tellMyAge();