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:
Green energy comes in ____ basic forms.

Ex Output:
two


Ex Input:
Millipedes have ____ pairs of legs on each body segment.

Ex Output:
two


Ex Input:
Tunicates have an average life span of ____ to three years.

Ex Output:

one