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

Example Input: Most women have _ problems getting pregnant with a retroverted uterus.
Example Output: no

Example Input: Jurassic rocks have _ outcrops in the area but they are identified by bore holes.
Example Output: no

Example Input: Fresh ginseng is less than _ years old and can be consumed in the fresh state.
Example Output:
four