In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Ex Input:
Figure skating is like flying, but it's also like climbing hundreds of stairs in _ minutes.

Ex Output:
four


Ex Input:
Fungi combine the advantages of the _ reproductive modes.

Ex Output:
two


Ex Input:
All cells act as sources, but most cells just propagate sound because they have _ amplitude.

Ex Output:

zero