The vocal parts are in order.

G (320003@1)name="chord_022100@1">E G (320003@1)name="chord_022100@1">E 

Jerry Cantral's Part:
G (320003@1)                             EInside (022100@1)always tryin to get back inside
G (320003@1)                                     EBut (022100@1)it's so hard to penetrate pig-thick skin


Chris Cornell's Part: 
             F (133211@1)          E (022100@1)              
I'm 'bout as low as I can get
    F (133211@1)                  EI'd (022100@1)leave but I can't forget
F (133211@1)            E (022100@1)G (320003@1)        A (x02220@1)   E (022100@1)
Still I wonder why  yeah  it ain't right
        D (xx0232@1)   A (x02220@1)             G (320003@1)   EMmmm (022100@1)it ain't right oooo   it ain't right
        D (xx0232@1)   AMmmm (x02220@1)it ain't right yeah


Layne Staley's Part:
         F (133211@1)            E'Bout (022100@1)as low as she can get
      F (133211@1)                       EShe'd (022100@1)leave me but she won't forget
F (133211@1)             E (022100@1)G (320003@1)   A (x02220@1)   EAnd (022100@1)she wonders why  she ain't right
    D (xx0232@1)   A (x02220@1)    G (320003@1)   EShe (022100@1)ain't right  ain't right
    D (xx0232@1)   AShe (x02220@1)ain't right


Mark Arm's Part:
F (133211@1)            E (022100@1)           F (133211@1) Now we're as low as we can get
E (022100@1)     F (133211@1)                E (022100@1)G (320003@1) Can't leave and can't forget
   A (x02220@1)   E (022100@1)      D (xx0232@1)   AWe (x02220@1)ain't right We ain't right
G (320003@1) E (022100@1)       D (xx0232@1)   ANot (x02220@1)right  we ain't right

Chris, Layne, Jerry, and Mark all repeat Ain't right

While Chris, Layne, and Mark all sing:
G (320003@1)  E (022100@1)                                  D (xx0232@1)name="chord_x02220@1">A    
It's hard to believe somebody tricked you
                                    G (320003@1)name="chord_022100@1">E
When you can see you were all behind
                                 D (xx0232@1)name="chord_x02220@1">A
It's all up to you so you gamble
                                   G (320003@1)name="chord_022100@1">E
Flat on your face and into the Fire (repeat once)