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: Mature plants can be up to ____ feet tall.

Output: six


Input: Consider Input: Mature birds boast a wing span of ____ feet.

Output: six


Input: Consider Input: Pratincoles have ____ toes, short bills and legs, long, pointed wings, and forked tails.


Output: four