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:
Owls have ____ toes on each foot, like most birds.

Ex Output:
four


Ex Input:
Inhibited desire is the most common sexual dysfunction, effecting ____ in three couples.

Ex Output:
one


Ex Input:
Hepatic necrosis begins about ____ days after infection.

Ex Output:

seven