Iron Maiden - Childhoods End Chords & Tabs

Iron Maiden
Childhood's End Intro
Tabbed by: Evilized

e|-------------------------------------------|    this goes 3x
B|-------------------------------------------|
G|--------------------------------9----------|
D|---9--12-11-----9----9--12-11----12-11-9---|
A|--9--------12-9-----9--------12------------|
E|-------------------------------------------|

4th time play:

e|-------------------------------------------|    
B|-------------------------------------------|
G|-------------------------------------------|
D|---9--12-11-----9----9--12-11--------------|
A|--9--------12-9-----9--------12--9---------|
E|-------------------------------------------|

[ Tab from: https://www.guitartabs.cc/tabs/i/iron_maiden/childhoods_end_tab_ver_2.html ]
e|-------------------------------------------|   this goes 3x
B|----12-14-12-14121112----------------------|
G|--13---------------------------------------|
D|-------------------------------------------|
A|-------------------------------------------|
E|-------------------------------------------|

4th time play:

e|-------------------------------------------|
B|----12-14-12-14121112----------------------|
G|--11---------------------------------------|
D|-------------------------------------------|
A|-------------------------------------------|
E|-------------------------------------------|

I believe this is the almost true intro. Since this is my 3rd tab, it will probably have mistakes.