Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:6/8
K:Bmin
['Bcd ecA BAG FAA', 'gfg efg afd']  
X:1
L:1/8
M:6/8
K:Bmin
 d/e/ | fdB Bcd | ecA BAG | FAA ABc | dcd ede | ddB Bcd | ecA BAG | FAA Aag | fdd d2 :| B | 
 Aff{g} fef |{a} gfg efg | afd dcd | Bed cBd | Aff fef |{a} gfg efg | afd bge | edc dcB | Aff Aff | 
{a} gfg efg | afd dcd | Bed cBA | fdB gec | afd bge |{b} aga bge | edc d2 ||  