Assemble a variety of chord formations to deepen the harmonic essence of the given musical passage.
|: cB AB cB A2 | GA FG A2 A2 | cB AB cB A2 | GA FG A2 A2 :|  
X:1
L:1/8
Q:1/4=120
M:4/4
K:Amin
|:"Am" cB AB cB A2 |"F" GA FG"Am" A2 A2 | cB AB cB A2 |"F" GA FG"Am" A2 A2 :|  