Construct a musical work that combines the specified alphabet-based pattern with the given melodic theme.
X:1
L:1/8
M:4/4
K:G
['G2 BG EGDC B,DGB AGAB', 'BGdG eGdf']  
X:1
L:1/8
M:4/4
K:G
 F | G2 BG EGDC | B,DGB AGAB | c2 ec B2 dB | cABG AGED | G2 BG EGDC | B,DGB AGAB | cdef gfge | 
 dcBA G3 :| A | BGdG eGdc | BGdB cAFA | BGdG eGdf | gdBG AGEG | BGdG eGdf | gdfg afdf | gefd ecdB | 
 cABG AGE :|  