Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:6/8
K:D
['fed cAA', 'Bcd cee dff cee ecA cee dfa', 'Bcd Ace a3 ecA ecA GBd f{agf}', 'e cAc']  
X:1
L:1/8
M:6/8
K:D
{a} fed cAA | EAA cAA | fed cAA | (3.B.B.GB dcB | fed cAA | EAA efg | (3.f.g.af{gf} g2 e | 
 dBG Bcd :| cee dff | cee ecA | cee dfa | dBG Bcd | (3.c.e.ee (3.d.f.ff | cee efg | 
 (3.f.g.af{gf} g2 e | dBG Bcd :| Ace a3 | ecA ecA | GBd f{agf} g2 | BAG Bcd | (3.f.g.af{gf} g2 e | 
 (3.f.a.fd ecA | (3agaf{a} gfe | dBG Bcd :| (3.A.A.EA A2 e | cAc ecB | AEA-AB=c | (3.B.B.GB dcB | 
 AEA e | cAc efg | faf (3gfge | dBG Bcd :|  