Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/4
M:3/4
K:Amin
['E A3/2 ^G/ A B2 c', 'c A2']  
X:1
L:1/4
M:3/4
K:Amin
 E |"Am" A3/2 ^G/ A |"E" B2 c |"Am" A2 A | A2 E | A3/2 ^G/ A |"E" B2 c |"Am" A3- | A2 :| e | 
"C" c2 e | c2 e |"Dm" f3/2 e/ f | d2 d |"G" B2 d | B2 d |"C" e3/2 d/ e2 | c2 c |"Am" A2 c | A2 d | 
"Dm" B2 d | B2 f |"Am" e3/2 d/ c |"E" d c B |"Am" A3- | A2 |]  