YOU SAID:

the enemy of my enemy is a friend of line

INTO JAPANESE

私の敵の敵はラインの友人です

BACK INTO ENGLISH

my enemy's enemy is a friend of the line

INTO JAPANESE

私の敵の敵は戦友だ

BACK INTO ENGLISH

my enemy's enemy is my comrade

INTO JAPANESE

私の敵の敵は私の同志です

BACK INTO ENGLISH

my enemy's enemy is my comrade