Here are 2 ways to play the beggining on the song and yes they are the same notes so its the same.

AND YES I KNOW THIS ISN'T BLACK SABBATH WHO MADE THIS SONG BUT THERE IS NO ROOM IN OZZY FOR THIS TAB!!!

Tuning EADGBE (STANDERD)

E]-----------------------------------------------------------------------------------
B]-----------------------------------------------------------------------------------
G]-----------------------------------------------------------------------------------
D]-----------------------------------------------------------------------------------
A]-----4---5---4---2-0---0-2-0-------------------------------------------------------
E]--22---2---2---2-----4-------4-0---------------------------------------------------

SECOND WAY
E]-----------------------------------------------------------------------------------
B]-----------------------------------------------------------------------------------
G]-----------------------------------------------------------------------------------
D]-----------------------------------------------------------------------------------
A]-----4---5---4---2-------2---------------------------------------------------------
E]--22---2---2---2---5-4-5---5-4-0---------------------------------------------------