def get$\_$item$\_$from$\_$sentence$($customer$\_$sentence: str$)->$ str:

$"""$Extract and return the name of the item the customer is ordering from

their request sentence 'customer$\_$sentence'.

Customers will only order from the menu using one of the following phrases:

$-$ "Please give me a$[$ combo of$]."$

$-$ "Can I have a $[$ combo$]?"$

In the phrases listed above:

$-\text{'}\text{'}$ represents the name of the item.

$-\text{'}[$ combo of$]\text{'}$ and $\text{'}[$ combo$]\text{'}$ are not required and may not be said.

Return the name of the item found in the customer's request $($eg$.$ "FRIES"$).$

If the customer orders a combo, also return the string "COMBO" at the start

of the string, seperate by a space $($eg$.$ "COMBO HAMBUGER"$).$ If the

customer's request is unclear or the item name or combo item is invalid,

return "UNKNOWN" instead.