Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/16
M:2/4
K:A
['agab aece fecA', 'G4- GABc']  
X:1
L:1/16
M:2/4
K:A
 (3efg | agab aece | fecA BAFA | EAGB ABcf | ecAc B2(3efg | agab aece | fecA BAGF | EGAB cedc | 
 BdcB A2 :: e2 | G4- GABc | A4- ABce | fece dcBd | cBAc B2e2 | G4- GABc | ABcA BcdB | cefa ecBd | 
 cABc A2 :|  