Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:3/4
K:Amin
['A2 Ec BE cA, dB, eC', 'AA/B/ AE a2 ee/d/ cB']  
X:1
L:1/8
M:3/4
K:Amin
 A2 Ec BE | cA, dB, eC | f/g/f/e/ d/e/d/c/ B/c/B/A/ | A2 ^GE"^\#?" FG | A2 Ec BE | cA, dB, eC | 
 ff/e/ dc BA | c/B/A/^G/ A2 E2 :: cc/B/ cG g2 | ee/d/ cG EC | cc/d/ dG g2 | ee/c/ c2 C2 | 
 AA/B/ AE a2 | ee/d/ cB A^G | AA/B/ AE a2 | ee/d/ cB A2 | ce df ea | Ag a2 A2 :|  