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.

Input: Consider Input: Amphibians have ____ legs, and often look like reptiles.

Output: four


Input: Consider Input: Sexual reproduction involves the union of cells from ____ parents.

Output: two


Input: Consider Input: Gloves have ____ ridges or crevices in which the bacteria can hide.


Output: no