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

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

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

}

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

console.log(john.tellMyName());
console.log(john.tellMyAge());

console.log(mary.tellMyName());
console.log(mary.tellMyAge());