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:
Every human being carries six to ____ abnormal recessive genes.

Ex Output:
eight


Ex Input:
Giant pandas move on all ____ legs.

Ex Output:
four


Ex Input:
High sprains are harder to treat and can sometimes take ____ weeks to heal.

Ex Output:

six