Compose a piece of music using the specified letter-based musical form and incorporating the assigned motif.
X:1
L:1/8
Q:1/2=90
M:4/4
K:none
['e2 c2', 'cAA a fefa f2 ec fBBc fBBf']  
X:1
L:1/8
Q:1/2=90
M:4/4
K:none
 f | eAcA{cd} e2 c2 | fBBc fBBf | ecac e2 c2 | (A/B/c/d/) eB cAA :: a | fefa f2 ec | fBBc fBBf | 
 eacg e2 c2 | (A/B/c/d/) ec cAA :|  