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: Hawks have ____ toes pointing forward and one pointing backwards.
Example Output: three

Example Input: Mages can select from ____ spheres of magic - fire, water, air, earth and astral.
Example Output: five

Example Input: Cheese makes a remarkable culture medium for bacteria, which stay alive for up to ____ months.
Example Output:
six