This is the absolutly correct version of the song.
Here it is

Standard Tuning
  Main Riff                1st ending     Reapeat main riff, then
E|-----------------------|--------------|-------------------------------------|
B|--9------2-2------5-5--|--------------|--------2-2--------------------------|
G|--9------2-2------6-6--|--4-4---------|--4-4---2-2--4-4---------------------|
D|--9------2-2------6-6--|--4-4---------|--4-4---2-2--4-4---------------------|
A|--7---------------4-4--|--2-2---------|--2-2--------2-2---------------------|
E|-----------------------|--------------|-------------------------------------|