Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
Q:1/8=232
M:4/4
K:Emin
['Ac BE']  
X:1
L:1/8
Q:1/8=232
M:4/4
K:Emin
|: BE (3(EDE) d2 cB | AD (3(FED) FA Ac | BE EF GA B^c | d^c dB e2 dc | BE (3(EDE) d2 cB | 
 AD (3(FED) FA Ac | BE EF GA B^c | dB Ac BE E2 | e^d ef gf ge | de fg af df | ed ef gf e^c | 
 dB Ac BE E2 | e^d ef gf ge | de fg af df | g2 fd (3(efg) fe | dB Ac BE E2 :|  