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Chord diagram for Bb6
Chord diagram for Fadd9
Chord diagram for G5
Chord diagram for Cadd9
Chord diagram for Dsus4
      OK, this song is very easy, and there are only 5 chords in the whole song. This is my first tab =)
So, here we go:

         EADGBe

Bb6:    (x13033)
Fadd9*: (1x3033)
G5:     (3x0033)
Cadd9*: (x30033)
Dsus4:  (x00233)

Capo on 3rd Fret

(Something that adds color to the first part [Intro, Verse 1, 1st Chorus],
is to pick first the bass note and then strum the remaining. 
In fact, I think it's actually done on the original track)

-----
Intro:
-----

Bb6  Fadd9*  G5 x2

-------
Verse 1:
-------

     Bb6                 Fadd9*               G5
What tongueless ghost of sin crept through my curtains?
Bb6                 Fadd9*            G5
Sailing on a sea of sweat on a stormy night
  Bb6                  Fadd9*              G5
I think he don't got a name but I can't be certain
    Bb6       Fadd9*      G5
And in me he starts to confide


------
Chorus:
------

        Bb6          Fadd9*    G5
That my family don't seem so familiar
       Bb6     Fadd9*       G5
And my enemies all know my name
       Bb6         Fadd9*       G5
And if you hear me tap on your window
           Cadd9*                      Dsus4
You better get on your knees and pray, panic is on the way


-------
Verse 2:
-------

   Bb6               Fadd9*            G5
My pulse pumps out a beat to the ghost dancer
   Bb6                  Fadd6                 G5
My eyes are dead and my throat's like a black hole
    Bb6                    Fadd9*          G5
And if there's a god would he give another chancer
   Bb6     Fadd9*       G5
An hour to sing for his soul

------
Chorus:
------

        Bb6          Fadd9*    G5
'Cause my family don't seem so familiar
       Bb6     Fadd9*       G5
And my enemies all know my name
       Bb6         Fadd9*       G5
And if you hear me tap on your window
           Cadd9*                      Dsus4
You better get on your knees and pray, panic is on the way

Bb6  Cadd9*  G5
Bb6  Cadd9*  G5  G5


-----------
Guitar Solo:
-----------

(I won't tab the guitar solo, but the chords are like this):

Bb6  Cadd9*  G5  G5   (You do this for a while, until the harmonica-like
                       guitar comes in, that's when you play this):

Bb6  Fadd9*  G5   x3  (Just like another Chorus)
Cadd9*  Dsus4


------
Chorus:
------

        Bb6          Fadd9*    G5
'Cause my family don't seem so familiar
       Bb6     Fadd9*       G5
And my enemies all know my name
       Bb6         Fadd9*       G5
And if you hear me tap on your window
         Bb6         Fadd9*                G5
Then you get on your knees, and you better pray
        Bb6          Fadd9*    G5
'Cause my family don't seem so familiar
       Bb6     Fadd9*       G5
And my enemies all know my name
       Bb6         Fadd9*       G5
And if you hear me tap on your window
           Cadd9*                      Dsus4
You better get on your knees and pray, panic is on the way

Bb6  Fadd9*  G5
Bb6  Fadd9*  G5                   Bb6  Fadd9*  G5
               Panic is on the way

(After this, the song becomes the same thing over and over, at least for
chords, so something you can do to add a bit of flavor to the end if you
don't have all the crazy effects Oasis has, 
is to alternate between "Fadd9*" and "Cadd9*" in the Outro. Just an advice):

-----
Outro:
-----

Bb6  Fadd9*  G5   (Fade)

(Last Chord heard): G5
    

Source: https://tabs.ultimate-guitar.com/tab/oasis/gas_panic_chords_866197

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