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: Scientists think that macaws mate for life, producing one to ____ young each year.
Example Output: three

Example Input: Females become sexually mature at the age of ____ years.
Example Output: five

Example Input: Babies can lose heat rapidly, as much as ____ times more quickly than adults.
Example Output:
four