Produce a compatible series of chord shifts that synergize with the given musical composition.
af |: gb eb g2 | fa ca f2 | eg cg ec | fA cf ac' | gb eb g2 | fa ca f2 | 
 eg cg ec |1 f2 z2 af :|2 f2 z2 c2 |: bg eb ge | af ca fc | ge cg ec | 
 fA cf ac' | bg eb ge | af ca fc | ge cg ec |1 f2 z2 c2 :|2 f2 z2 z2 |]  
X:1
L:1/8
M:3/4
K:F
 af |:"C7" gb eb g2 |"F" fa ca f2 |"C7" eg cg ec |"F" fA cf ac' |"C7" gb eb g2 |"F" fa ca f2 | 
"C7" eg cg ec |1"F" f2 z2 af :|2"F" f2 z2 c2 |:"C7" bg eb ge |"F" af ca fc |"C7" ge cg ec | 
"F" fA cf ac' |"C7" bg eb ge |"F" af ca fc |"C7" ge cg ec |1"F" f2 z2 c2 :|2"F" f2 z2 z2 |]  