Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:4/4
K:Amix
['f2 e f3']  
X:1
L:1/8
M:4/4
K:Amix
 AcBc AFFA | E2 EF EF A2- | AcBc AF F2 | e f2 e f3 A- | AcBc AFFA | E2 EF EF A2- | AcBc AF F2 | 
 e f2 e f3 f- | faef cBBc | e2 ce fBBf- | faef cB B2 | z f2 e f3 f- | faef cBBc | e2 cA BcAB | 
 c2 Bc eccB | AFFE F3 A- ||  