Generate a musical piece using the presented motif and follow the alphabetical structure provided.
X:1
L:1/8
M:4/4
K:Amix
['a4 e2 a2 cAcd e2', 'ABcd eAcA eAaA c2']  
X:1
L:1/8
M:4/4
K:Amix
|: e2 | a4 e2 a2 | cAcd e2 dc | BB g2 dd g2 | BGBc d2 cB | a4 e2 a2 | cAcd e2 af | e2 dcBc de | 
 c2 A2 A2 :: e2 | ABcd eAcA | eAaA c2 BA | GABc dBGB | dBgd B2 AG | ABcd eAcA | eAaA c2 e2 | 
 dcBA GABd | c2 A2 A2 :|  