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: Inversions have the classic double loop at meiosis, and have ____ crossovers when heterozygotes.
Example Output: no

Example Input: Many churches have ____ windows on each side of the nave, numbers some consider holy.
Example Output: seven

Example Input: Deciduous teeth begin to be replaced from ____ weeks until approximately four months of age.
Example Output:
three