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.

Ex Input:
Comprehension is the second of the ____ elements of the informed consent process.

Ex Output:
three

Ex Input:
Some species take ____ to two years, or even more.

Ex Output:
one

Ex Input:
Sewage travels through ____ different sets of pipes.

Ex Output:
three