Tuning:F,C,G,C

Riff 1
F ---------
C ---------
G ---------
C 0--------

Riff 2
F ----------------------------
C ----------------------------
G ----------------------------
C 0131-0131-0131-01333--------

Riff 3
F --------------------
C --------------------
G --------------------
C 0131-0131-0131-3331-

Riff 4
F ----------------------------
C ----------------------------
G ----------------------------
C  00131-00131-00131-3331-----

Riff 5
F ------------------------
C 00000000---00000000-----
G ------------------------
C ------------------------
[ Tab from: https://www.guitartabs.cc/tabs/s/system_of_a_down/prison_song_btab.html ]
Riff 6
F --------------
C 0-1-0131------
G --------------
C --------------

Riff 7
F ----------------
C ----------------
G ----------------
C 00-000-00-000---

Riff 8
F ---------------------
C ---------------------
G ---------------------
C 00--000-000--0003----
                          
And that's it its pretty easy once you play it a couple times have fun.
    (Heres the order for the Riffs)

Riff 1 x1
Riff 2 x2
Riff 3 x1
Riff 4 x2
Riff 5 x2 
Riff 6 x2
Riff 5 x2
Riff 4 x2
Riff 5 x2
Riff 6 x2 
Riff 5 x2
Riff 4 x2
Riff 2 x1
Riff 4 x1
Riff 7 x2
Riff 8 x4
Riff 6 x4
Riff 5 x2
Riff 4 x2
Riff 3 x1
Riff 4 x1