Construct a musical piece by amalgamating the designated alphabetical representation and the supplied musical theme.
X:1
L:1/8
Q:1/2=80
M:4/4
K:C
['d2 D2 F2 A2 d2 dd d3', '(A/B/c/d/) e2 ee e2 de f2 ff']  
X:1
L:1/8
Q:1/2=80
M:4/4
K:C
 C |[K:D] !fermata!ad f ae !>!aA/B/c/ | d2 D2 F2 A2 | d2 dd d3 f | e2 Ag f2 Ag | fagf eABc | 
 d2 D2 F2 A2 | d2 dd d3 f | e2 a2 ^gbag | a2 AA A2 || (A/B/c/d/) | e2 ee e2 de | f2 ff f2 dc | 
 B2 cd edcB | ^A2 FF F2 A2 | BFdB cAec | dFfd eFge | (3gab (3gfe d2 c2 | B2 BB B2 (A/B/c) | 
 d2 DD D2 (d/e/f) | e2 EE E2 (e/f/g) | fdec dBed | c2 AA A2 GF | GBed cBAG | FAdc BAGF | 
 (3Edc (3BAG F2 E2 | D2 DD D2 |]  