Riff A: (once)
A-----------00000000----------22222222--
E--00000000----------00000000-----------

Riff B: (once)
A-----------22222222-00000000-----------
E--00000000-------------------00000000--

Riff A: (once)
Riff B: (once)

Riff C: (once)
A--00000000-00000000--------------------
E--------------------00000000-00000000--

Riff D: (once)
A--00000000-00000000-22222222-22222222--
E---------------------------------------

Riff A: (once)
Riff B: (once)

Riff E: (once)
A--2222-0000-----------
E------------00000000--

Riff F: (once)
A--22222222-22222222-00000000-00000000----------------------
E--------------------------------------00000000-00000000-0--