Compose melodious music utilizing the prescribed letter representation and integrating the given thematic element.
X:1
L:1/8
M:2/4
K:D
['Aa fd A2', 'c/e/A ce', 'A (BA)(dc) (ed)(fA) (BA) (FA) AG EG']  
X:1
L:1/8
M:2/4
K:D
 a>a Aa | fd A2 | (BA)(dc) | fe (3(f/g/a/) A | aa Aa | fd A2 | A/B/c/d/ ef | d3 z |] !fermata!A | 
 c/e/A ce | gf eA | d/f/A df | ag eA | c/e/A ce | c/d/e/f/ ga | d3"^D.C." |] A | (BA)(dc) | 
 (ed)(fA) | (BA) (FA) | AG EG | (BA)(dc) | (ed) (fA) | (Be) (Ac) | d3"^D.C." |]  