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:F
['C [FA,]3 G FGAB cfag fedc', 'bagf geca bagf']  
X:1
L:1/8
M:2/2
K:F
 C |"^>" [FA,]3 G FGAB | cfag fedc | Tfefd cAFA | B2 G2 G3 C |"^>" [FA,]3 G FGAB | cfag fedc | 
 defg afcB | A2 F2 F2 :: AG | FAcf afcf | dcBA B3 A | GBdg bgeg | gfed c3 a | bagf geca | 
 bagf geca | bagf ebge | [fA]2 [ac]2 [fA]2 :|  