export class Animal{
    constructor(name){
        this.name = name
    }
    cry(){
        return "cry!"
    }
}

export class Cat extends Animal{
    constructor(name){
        super(name)
    }
    cry(){
        return "nyaa"
    }
}

export class Dog extends Animal{
    constructor(name){
        super(name)
    }
    cry(){
        return "bau"
    }
}