Left hand: Gb octave
Cb octave (all the way through the song)
(Four beats before changing octaves)

Right Hand: B-Ab-Gb-Db-F-Gb-F-Db-C

So as 당신 play (in the right hand): B-Ab-Gb-Db 당신 play (in the left hand) the Gb octave.
Then change your left hand octave to Cb octave as 당신 play (in the right hand): F-Gb-F-Db
Then for the C note (in the right hand) 당신 finish with a Gb octave again (in the left hand)

I hope this helps you. But if not visit 유튜브 and type in 'How To Play Earth Song On Piano'. The tutorials are amazing.