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

Input: Consider Input: Most people go back to work within _ to three months after having a heart attack.

Output: one

Input: Consider Input: Infertility affects one in _ couples and affects both men and women.

Output: seven

Input: Consider Input: Birds usually feed in _ types of areas - ground, tabletop, hanging and tree trunk.
Output: four