Assemble a piece of music by merging the alphabetic representation of the predetermined musical pattern and the provided melodic theme.
X:1
L:1/8
M:4/4
K:D
['dAFD GBAG FEFA dFGE', 'fAdc dfaf']  
X:1
L:1/8
M:4/4
K:D
|: (3ABc | dAFD GBAG | FEFA dFGE | FAdc dcBA | BGEF GABc | dAFD GBAG | FEFA dFGE | FA (3def gecd | 
 eddc d2 :: dg | fAdc dfaf | ed (3Bcd efge | fAdc dfaf | (3gfe (3dcB ADFA | BG G2 BG (3Bcd | 
 AF (3ABc defd | (3ABA fd Bgec | eddc d2 :|  