Construct a musical work that combines the specified alphabet-based pattern with the given melodic theme.
X:1
L:1/8
M:2/2
K:G
['(dc) BGDG BGDG', 'G2 (ga) bagf efga bagf e2 (fg)']  
X:1
L:1/8
M:2/2
K:G
 (dc) | BGDG BGDG | (3gag fg e2 (dc) | BGDG BGDG | dcBc A2 (dc) | BGDG BGDG | (3gag fg e2 (dc) | 
 Bdfe dcAF | G2 GG G2 :| (ga) | bagf efga | bagf e2 (fg) | agfe defg | agfe d2 (3def | gfgd e2 d2 | 
{d} cBAB cdef | gfgd ecAF | G2 GG G2 :|  