Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/8
M:6/8
K:A
['', 'f2 e', 'fac B2']  
X:1
L:1/8
M:6/8
K:A
 e |: a2 e c2 e | agf edc | aff f2 e | fag f2 e | a2 e c2 e | agf edc | d2 e f2 e |1 fac B2 e :|2 
 fac B2 A |: cAA eAA | cAc edc | dBB fBB | dBd fed | cAA eAA | cAc edc | d2 e f2 e |1 fac B2 e :|2 
 fac B2 e ||  