Line Sorter

Natural order sorts embedded numbers (A1, A2, A10). Text order uses the page language. Numeric mode requires every non-empty line to be a finite number. Empty means a zero-length line; whitespace-only lines are data. Equal values keep their original order. Output line breaks use LF. Kanji readings are not guessed. Maximum 1 MB UTF-8.

Example: A2 A10 A1 → A1 A2 A10