In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Ex Input:
Frozen grafts can have a shelf life of up to _ years.

Ex Output:
five


Ex Input:
Clinical psychologists differ from psychiatrists in _ important ways.

Ex Output:
two


Ex Input:
Mitotic activity is usually minimal and there is _ necrosis or vascular invasion.

Ex Output:

no