The commas indicate the beat in quarter notes. I've written the note names underneath in
you don't them.
[ Tab from: https://www.guitartabs.cc/tabs/b/beck/brother_btab_ver_3.html ]
' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
G|---------|---------|---------|---------| Play this twice and repeat the
D|---------|---------|---------|---------| last two bars the second time.
A|-----5---|-----3---|---------|---------|
E|-3-------|-5-------|-3---1---|-5-------|
G D A C G F A
Then play G for two bars like this.
' ' ' ' ' ' ' '
G|---------|---------|
D|---------|---------|
A|---------|---------|
E|-3-------|-3-------|
As far as I can tell, the song repeats this arrangement right the way through. It's very
to play and really enjoyable if you like this kinda thing.
Have fun!