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:
Mages can select from ____ spheres of magic - fire, water, air, earth and astral.

Ex Output:
five


Ex Input:
Irrigation can increase land productivity by three to ____ times, especially in the north.

Ex Output:
seven


Ex Input:
Cubs start to walk at ____ months of age.

Ex Output:

four