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

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

    tellMyAge() {
        return ` and i am ${this.age} years old.`;
    }

}

let John = new Person ("John", 40);
console.log(John.tellMyName(), John.tellMyAge());
let Mary = new Person ("Mary", 35);
console.log(Mary.tellMyName(), Mary.tellMyAge());