% Chuck Berry, Maybelline

In: I | | | |
Ch: I | | | | IV | | I | | V | | I | |
Vr: I |*12
Fadeout: I |*4  % What is the unit that's repeating and fading? Unclear - let's say 4 mm.
S: [Bb] $In $Ch $Vr $Ch $Vr $Ch $Ch $Ch $Ch $Vr $Ch $Fadeout   % Choruses 4 and 5 are instrumental