Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:9/8
K:Bmin
['dcB dcB']  
X:1
L:1/8
M:9/8
K:Bmin
|:"Bm" FBc dcB dcB | FBc dcB"A" c2 A |"Bm" FBc dcB dcB |1 efd Bcd"A" c2 A :|2 efd Bcd"A" cBA |: 
"G" GBc dcB dcB | GBc dcB"A" c2 A |"G" GBc dcB dcB |1 efd Bcd"A" c2 A :|2 efd Bcd"A" cBA ||  