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

[EX Q]: Psychiatrists categorize symptoms into _ categories.
[EX A]: three

[EX Q]: Most people stay in a nursing home for less than _ years.
[EX A]: four

[EX Q]: Many Indian myths revolve around the _ seas and seven continents.
[EX A]:
seven