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: Ostriches come in at least ____ breeds.
Example Output: two

Example Input: Romantic love involves ____ people.
Example Output: two

Example Input: Children also require ____ further amino acids, histidine and arginine.
Example Output:
two