Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/8
M:4/4
K:D
['(3ABc dAFA BGEG FA dd d2 A2', 'd3 B dgba gfed ceag fedc Bdgf']  
X:1
L:1/8
M:4/4
K:D
 (3ABc | dAFA BGEG | FA dd d2 A2 | Bdgf feed | ceAA AGFE | Fddd dAGF | Eeee ecBA | afbg fedc | 
 d2 d2 d3 :: B | dgba gfed | ceag fedc | Bdgf feed | ecAA AGFE | Fddd dAGF | Eeee ecBA | 
 afbg fedc | d2 d2 d2 :|  