Inventory Manager

Use a HashMap to manage an inventory of items and their quantities. Process commands to add items, remove items, and check stock.

Input

• Line 1: number of commands N (0 <= N <= 2·10^4)
• For each command:
  • Line 1: command type (add, remove, or check)
  • Line 2: the item name (a single word of letters and digits, at most 20 characters; apple and Apple are different items)
  • Only for add and remove, line 3: the quantity (integer, 0 <= quantity <= 10^5; never negative, but it can be 0)

Output

• For each check command: print ITEM: QTY
• For each failed remove: print Not enough ITEM
• Last line: Items: N (total number of distinct items with qty > 0)

Examples

Input:
5
add
apple
10
add
banana
5
remove
apple
3
check
apple
check
orange

Output:
apple: 7
orange: 0
Items: 2

Input:
3
add
milk
2
remove
milk
5
check
milk

Output:
Not enough milk
milk: 2
Items: 1

Input:
4
add
apple
3
remove
apple
3
check
apple
check
apple

Output:
apple: 0
apple: 0
Items: 0

Removing exactly all of an item's stock brings it to 0. It stays known but no longer counts toward Items: N.