Construct tunes that adhere to the specified chord alterations.
'F', 'Gm', 'F', 'F', 'Gm', 'Gm', 'F', 'Gm', 'C', 'F', 'Am', 'C', 'F', 'Am', 'Gm', 'F', 'Gm', 'F', 'C'  
X:1
L:1/8
Q:1/4=150
M:2/4
K:Gdor
|:"F" z2 AB | c2 c2 |"Gm" d2 dB |"F" c4 |"F" cB"Gm"dB |"Gm" BA"F"cA | AG"Gm"BA |"C" G4 :: 
"F" z2"Am" ef |"C" g2 g2 |"F" f2"Am" ef |"Gm" d4 |"F" c2 AB | c2 c2 |"Gm" B2"F" AB |"C" G4 :|  