Generate chord structures that harmonize with the provided piece of music.
|: [B,D]2 [B,D][A,^C] [B,D][DB] | [Fd]4 [DB]2 | [Ec][Ge] [Ge]2 [DB][Fd] [Fd]2 | 
 [B,D]2 [B,D][A,^C] [B,D][DB] | [Fd]4 [DB]2 | [CA][Ec] [Ec]2 [DB]2 z2 :: 
 [AC]2 [AC][BD] [cE]2 | [BD]2 [BD][cE] [dF]2 | [AC]2 [AC][BD] [cE]2 | 
 [BD]2 [BD][cE] [dF]2 | [B,D]2 [B,D][A,^C] [B,D][DB] | [Fd]4 [DB]2 | 
 [Ec][Ge] [Ge]2 [DB][Fd] [Fd]2 | [B,D]2 [B,D][A,^C] [B,D][DB] | [Fd]4 [DB]2 | 
 [CA][Ec] [Ec]2 [DB]2 z2 :|  
X:1
L:1/8
M:34/44
K:Bb
|:"Bb" [B,D]2 [B,D][A,^C] [B,D][DB] | [Fd]4 [DB]2 |"Eb" [Ec][Ge] [Ge]2"Bb" [DB][Fd] [Fd]2 | 
"Bb" [B,D]2 [B,D][A,^C] [B,D][DB] | [Fd]4 [DB]2 |"F7" [CA][Ec] [Ec]2"Bb" [DB]2 z2 :: 
"F7" [AC]2 [AC][BD] [cE]2 |"Bb" [BD]2 [BD][cE] [dF]2 |"F7" [AC]2 [AC][BD] [cE]2 | 
"Bb" [BD]2 [BD][cE] [dF]2 |"Bb" [B,D]2 [B,D][A,^C] [B,D][DB] | [Fd]4 [DB]2 | 
"Eb" [Ec][Ge] [Ge]2"Bb" [DB][Fd] [Fd]2 |"Bb" [B,D]2 [B,D][A,^C] [B,D][DB] | [Fd]4 [DB]2 | 
"F7" [CA][Ec] [Ec]2"Bb" [DB]2 z2 :|  