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:
Infected rodents carry and secrete the virus for about ____ days.

Ex Output:
seven


Ex Input:
Most healthy men experience about three to ____ erections in their sleep each night.

Ex Output:
five


Ex Input:
Many authors believe that minerals have one chakra, while animals have ____ or four.

Ex Output:

three