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

Ex Input:
Females reach sexual maturity around four to _ year-olds.

Ex Output:
five


Ex Input:
Clinical psychologists differ from psychiatrists in _ important ways.

Ex Output:
two


Ex Input:
Tee ball is the entry sport to baseball for young players, generally _ to eight years old.

Ex Output:

four