Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/8
Q:1/4=100
M:2/2
K:G
['B2 AG dBec', 'gdgb eceg']  
X:1
L:1/8
Q:1/4=100
M:2/2
K:G
 c |"^tr" B2 AG dBec | dBgd A>GFA | B2 AG dBec | BGAB G/G/G G2 :: e | gdgb eceg | BGcB"^tr" A>GFe | 
 gdgb eceg | dBcA G/G/G G2 :|  