process.stdin.resume()
process.stdin.setEncoding('utf8')

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

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

    tellMyAge()
    {
        console.log (`I have ${this.age} years old`)
    }
}
const john = new Person("John", 40);
const mary = new Person("Mary", 35);

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