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

    tellMyName(){
        console.log(`My name is ${this.name}`)
    }

    tellMyAge(){
        console.log(`I am ${this.age} years old`)
    }
};

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

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

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