intro on a standard tuned(EADGBE) acoustic:

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|-0------0---0------0---0------0---4------4---0------0---0------0---7------7---4------4---
|-----------------------------------------------------------------------------------------
|----2----------2----------2----------2----------2----------2----------4----------2-------
|-0----0-----0----0-----0----0-----4----4-----0----0-----0----0-----7----7-----4----4-----
|-----------------------------------------------------------------------------------------

play that again except a different ending:

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|-0------0---0------0---0------0---4------4---0------0---0------0---7------7---4------4---5------5---5------5---5------5-
|------------------------------------------------------------------------------------------------------------------------
|----2----------2----------2----------2----------2----------2----------4----------2----------4----------4----------4-----
|-0----0-----0----0-----0----0-----4----4-----0----0-----0----0-----7----7-----4----4-----5----5-----5----5-----5----5---
|------------------------------------------------------------------------------------------------------------------------