Produce a compatible series of chord shifts that synergize with the given musical composition.
"^Intro" | [fd]2 [ec] | [dB]2 [BB] | [cA] [GF]/[AE]/ | [BD] z || |: [fd]2 [ec] | 
 [dB]2 [BF] | [fd] [ec] | [dB] [BF] :| | [AC]2 [BD] | [cE]2 [AC] | 
 [BD] [eG] | [dF]2 | [BD] [eG] | [dF]2 |: 
 [eG] [eG]/[eG]/ [cE]/[eG]/ | [dF]2 [BD] | [cE] [GF]/[AE]/ | [BD] z :|  
X:1
L:1/4
M:23/44
K:Bb
"^Intro" |"Bb" [fd]2 [ec] | [dB]2 [BB] |"F7" [cA] [GF]/[AE]/ |"Bb" [BD] z ||"A" |:"Bb" [fd]2 [ec] | 
 [dB]2 [BF] |"F7" [fd] [ec] |"Bb" [dB] [BF] :|"B" |"F7" [AC]2 [BD] | [cE]2 [AC] | 
"Bb" [BD]"Eb" [eG] |"Bb" [dF]2 |"Bb" [BD]"Eb" [eG] |"Bb" [dF]2"C" |: 
"Eb" [eG] [eG]/[eG]/ [cE]/[eG]/ |"Bb" [dF]2 [BD] |"F7" [cE] [GF]/[AE]/ |"Bb" [BD] z :|  