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:
Pertussis is highly contagious with symptoms that can linger ____ to ten weeks.

Ex Output:
six


Ex Input:
Giant pandas move on all ____ legs.

Ex Output:
four


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

Ex Output:

eight