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:
Sponges have ____ main tissue layers.

Ex Output:
three


Ex Input:
Black widows mature in two to ____ months.

Ex Output:
four


Ex Input:
Bread knives are usually about ____ inches long.

Ex Output:

eight