Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Example Input: Human gestation is divided into three trimesters of ____ months each.
Example Output: three

Example Input: Insects are identified by having ____ sets of paired legs, while isopods have seven.
Example Output: three

Example Input: Most bats return to their roosts by ____ or five o'clock in the morning.
Example Output:
four