class Ship {
    constructor(name, length) {
        this.name = name
        this.length = length
    }
}

class Carrier extends Ship {
    constructor() {
        super('Carrier', 5)
    }
}

class Battleship extends Ship {
    constructor() {
        super('Battleship', 4)
    }
}

class Destroyer extends Ship {
    constructor() {
        super('Destroyer', 3)
    }
}

class Submarine extends Ship {
    constructor() {
        super('Submarine', 3)
    }
}
class Patrolboat extends Ship {
    constructor() {
        super('Patrolboat', 2)
    }
}

module.exports = { Carrier, Battleship, Destroyer, Submarine, Patrolboat }