Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:2/2
K:Dmin
['D B z ^c edcd']  
X:1
L:1/8
M:2/2
K:Dmin
|:"A" ^cdeg fedc | ed^cd e3 c |"Bb" Bd^cB dcBd |"A" ^cBAG A3 A |"A" ^cdeg fedc | ed^cd e3 c | 
"Bb" BAGB AGFE |1"Dm" D4 D3 A :|2"Dm" D4 D4 |:"Gm" D B z ^c edcd | ed^cd"A" e4 | 
"Gm" D B z ^c edcd | ed^cB"A" A2 A2 |"Gm" D B z ^c edcd | ed^cd"A" e3 c |1"Bb" Bd^cB AGFG | 
"A" [A^c]4 [ac]4 :|2"Bb" Bd^cB AGFE |"Dm" D4 D4 |]  