Formulate chord combinations to increase the harmonic complexity of the specified musical excerpt.
F2 |: (BF) DF BF | F2 Ac e2 | (AF) =EF AF | F2 Bd f2 | (BF) DF BF | F2 Ac e2 | 
 cB AF eA |1 B2 z2 F2 :|2 B2 z2 z2 |: =EF ^FG ^GA | BF d3 B | Ag fA eA | 
 Bg fB d2 | =EF ^FG ^GA | BF d3 B | Ag fA eA |1 B2 z2 z2 :|2 B2 z2 cB || 
[K:F] Af cC FA | BC EG cB | Ge cC GB | AC FA cB | Af cC FA | BC EG cB | Ge cA BG | 
 F2 z2 CC || CF GB AG | FA cf ed | c2 BC EG | c2 AC F2 | CE GB AG | 
 FA cf ed | c2 BC EG | F2 z2 z2 ||[K:Bb] (FB) Fd cB | Ae Ag f2 | e2 Fe dc | 
 BD FB d2 | (FB) Fd cB | Ae Ag f2 | e2 Fe dc | B2 z2 f2 || g2 f2 e2 | 
 dA BD F2 | =EF AC _EA | BD FB d2 | g2 f2 e2 | dF BD F2 | =EF AC _Ec | 
 B2 z2 z2 |]  
X:1
L:1/8
M:3/4
K:Bb
 F2 |:"Bb" (BF) DF BF |"F7" F2 Ac e2 | (AF) =EF AF |"Bb" F2 Bd f2 | (BF) DF BF |"F7" F2 Ac e2 | 
 cB AF eA |1"Bb" B2 z2 F2 :|2"Bb" B2 z2 z2 |:"F7" =EF ^FG ^GA |"Bb" BF d3 B |"F7" Ag fA eA | 
"Bb" Bg fB d2 |"F7" =EF ^FG ^GA |"Bb" BF d3 B |"F7" Ag fA eA |1"Bb" B2 z2 z2 :|2"Bb" B2 z2 cB || 
[K:F]"F" Af cC FA |"C7" BC EG cB | Ge cC GB |"F" AC FA cB | Af cC FA |"C7" BC EG cB | Ge cA BG | 
"F" F2 z2 CC ||"C7" CF GB AG |"F" FA cf ed |"C7" c2 BC EG |"F" c2 AC F2 |"C7" CE GB AG | 
"F" FA cf ed |"C7" c2 BC EG |"F" F2 z2 z2 ||[K:Bb]"Bb" (FB) Fd cB |"F7" Ae Ag f2 | e2 Fe dc | 
"Bb" BD FB d2 | (FB) Fd cB |"F7" Ae Ag f2 | e2 Fe dc |"Bb" B2 z2 f2 ||"Eb" g2 f2 e2 | 
"Bb" dA BD F2 |"F7" =EF AC _EA |"Bb" BD FB d2 |"Eb" g2 f2 e2 |"Bb" dF BD F2 |"F7" =EF AC _Ec | 
"Bb" B2 z2 z2 |]  