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: Birds have ____ beak, two wings, and two feet.

Output: one


Input: Consider Input: Beryllium has ____ protons and four electrons.

Output: four


Input: Consider Input: Arboviral infections can manifest as ____ types of illnesses in humans.


Output: three