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:
Ferrets normally tremble for ____ reasons.

Ex Output:
two

Ex Input:
Lung disease is America's number ____ killer, responsible for one in seven deaths.

Ex Output:
three

Ex Input:
Most salamanders have only four front toes but ____ rear toes.

Ex Output:
five