YOU SAID:

whoever came alone needs to leave

INTO JAPANESE

一人で来た人は誰でも去る必要があります

BACK INTO ENGLISH

Anyone who comes alone must leave

INTO JAPANESE

一人で来る人は出て行け

BACK INTO ENGLISH

If you come alone, get out.

INTO JAPANESE

一人で来たら出て行け。

BACK INTO ENGLISH

If you come alone, get out.