YOU SAID:
don't tell the left hand what the right hand is doing
INTO JAPANESE
右手が何をしているのか左手に言わないでください
BACK INTO ENGLISH
Don't tell your left hand what your right hand is doing
INTO JAPANESE
右手が何をしているのかを左手に言わないでください
BACK INTO ENGLISH
Don't tell your left hand what your right hand is doing
You've done this before, haven't you.