// Interface
interface BlackColor{
    feed(): string

}
interface fourLegs {
    pet(): string
}

// Class GrandParents
class Animal {
    photo(): string {
        console.log('smile to the photo');
    }
}

// class Parents
class Cat extends Animal implements fourLegs {
    pet(): string {
        console.log("you can pet them");
    }

    sound(): string {
        console.log('can Meaoouuuw');
    }
}

// Class son
class EuropeanCat extends Cat implements BlackColor {
        color: string;
}
// Class son
class ChartreuxCat extends Cat {
}

//class Parents
class Dog extends Animal implements fourLegs {
    pet(): string
    }
    sound():string {
        console.log('can bark');
    }

//class son
class TerreNeuveDog extends Dog implements BlackColor {
    feed(): string {
        console.log("you have to feed them");
    }
}

// class son
class MoonMoonDog extends Dog {

}

// class Parents
class Birds extends Animal {
    fly(): string {
        console.log('can fly')
    }
}

//class son
class Mesange extends Birds {

}

//class son
class Merle extends Birds implements BlackColor{
    feed(): string {
        console.log("you have to feed them");
    }

}

//class Parent
class Fish extends Animal{
    swim(){
        console.log('can swim')    }
}

//class Son
class Thon extends Fish {

}
class son
class Shark extends Fish {

}

class Worm extends Animal {

}