stock = {
    "Alts": 3190,
    "Mains": 146,
    "2010": 2,
}

def show_stock():
    print("Account stock Stock:")
    for item, quantity in stock.items():
        print(f"{item}: {quantity}")

def add_stock(item, amount):
    if item in stock:
        stock[item] += amount
    else:
        stock[item] = amount
    print(f"Added {amount} {item}(s)")

def remove_stock(item, amount):
    if item in stock and stock[item] >= amount:
        stock[item] -= amount
        print(f"Removed {amount} {item}(s)")
    else:
        print("Not enough stock or item doesn't exist.")


show_stock()