import random

class Warehouse:
    def __init__(self):
        self.stock = {"마우스": 2}

    def check_stock(self, item, quantity):
        if item in self.stock and self.stock[item] >= quantity:
            self.stock[item] -= quantity
            return True
        else:
            return False

class Shipping:
    def __init__(self, item, quantity):
        self.item = item
        self.quantity = quantity
        self.tracking_number = random.randint(1000000000, 9999999999)
        print(f"{item} {quantity}개 주문 완료. 운송장 번호: {self.tracking_number}")


warehouse = Warehouse()
item_order = "마우스"
quantity_order = 3

if warehouse.check_stock(item_order, quantity_order):
    shipping = Shipping(item_order, quantity_order)
else:
    print("재고 부족으로 주문이 취소되었습니다.")