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

Ex Input:
Trees can also be air layered but air layering usually takes four to _ months to be successful.

Ex Output:
six

Ex Input:
Bilinear interpolation uses a weighted average of the _ nearest pixels.

Ex Output:
four

Ex Input:
Most people buy a new car every _ to ten years depending on their income and needs.

Ex Output:
three