Pixies - Wave Of Mutilation Chords & Tabs

Bb  ?? i dunno 
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[ Tab from: https://www.guitartabs.cc/tabs/p/pixies/wave_of_mutilation_crd_ver_2.html ]
F           Am              Bb        Bb-A-F
Ceased to resist, given my goodbyes
F        Am            Bb       Bb-A-F
Drove my car into the ocean
F	      Am               Bb    
You think I'm dead but I sail away
     F       Am    Bb    F       Am    Bb    F       Am    Bb
On a wave of mutilation wave of mutilation wave of mutilation
F    Bb
Wave
F    Bb
Wave