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:
Seismologists offer ____ major theories for the occurrence of large, deep earthquakes.

Ex Output:
three


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

Ex Output:
seven


Ex Input:
Pythons have ____ rows of teeth in their upper jaw.

Ex Output:

four