Formulate chord combinations to increase the harmonic complexity of the specified musical excerpt.
ABcB A2e2 | c2A2 B2e2 | dedcB2AB |1 c2AcB2 :|2 cABG A4 || ABcd2<e2e | 
 d2g2 e2c2 |1 ABce d2>e2 | dedc B4 :|2 ABce d2>B2 | cABG A4 ||  
X:1
L:1/16
M:2/4
K:Amin
"Am" ABcB A2e2 |"Am" c2A2 B2e2 |"Dm" dedc"G"B2AB |1"F" c2AcB2 :|2"G" cABG"Am" A4 ||"Am" ABcd2<e2e | 
"G" d2g2"C" e2c2 |1"F" ABce"G" d2>e2 |"Dm" dedc"Em" B4 :|2"F" ABce"G" d2>B2 |"Em" cABG"Am" A4 ||  