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

Example Input: Lightning can travel _ miles or more horizontally from the storm, then strike the ground.
Example Output: six

Example Input: Tobacco kills four million people a year, one death every _ seconds.
Example Output: eight

Example Input: Sealants can normally last up to _ years and hold up very well under normal chewing.
Example Output:
five