Construct a melodic piece using the designated alphabetic pattern and the provided musical theme.
X:1
L:1/8
Q:1/4=88
M:4/4
K:D
['d2 c B A2 (3(Bc d)', 'A d2']  
X:1
L:1/8
Q:1/4=88
M:4/4
K:D
"^Andante"S | d | d2 c B A2 (3(Bc d) | F3/2 F/ G E D3 d |{e} d2 c B A2 (3(Bc d) | F F G E D3 || A | 
 F3/2 D/ F A d2 (3(Bc d) | c3/2 A/ B ^G A2 (3(AB) c |{e} d2 c B A2 (GB/G/) | F F G E D3 A | 
 F3/2 D/ F A d2 (3(Bc d) | c3/2 A/ B ^G A2 (3(AB) c |{e} d2 c B A2 (GB/G/) | F F G E D3"_Sym:" A | 
 d2 cB{B} A2{A} GB/G/ | FFGE D3 |]  