class Person {
  constructor(name, age) {
      this.name = name;
      this.age = age;
  }
  tellMyName() {
      console.log(`I am ${this.name}`)
  }
  tellMyAge() {
      console.log(`I am ${this.age} years old`)
  }
}
const john = new Person('John', 40)
const mary = new Person('Mary', 35)

john.tellMyName()
john.tellMyAge()

mary.tellMyName()
mary.tellMyAge()