class Person {
    name : string;
    age : number;

    constructor (name:string, age:number){
        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.tellMyAge();
Mary.tellMyName();