Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/8
M:4/4
K:G
['GFEF GABA Bdef g2', 'A2 Beed BcdA Bdef g2']  
X:1
L:1/8
M:4/4
K:G
 GFEF GABA | Bdef g2 ag | GFEF GABd | egdB AcBA | GFEF GABA | Bdef g2 a2 | bgaf gfed | 
 egdB BA A2 || Beed BcdA | Bdef g2 gg | Beed Bcdf | egdB BA A2 | Beed BcdA | Bdef g2 a2 | 
 bgaf gfed | egdB AcBA ||  