Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/8
M:6/8
K:G
['A BGG dGG', 'gfg edc']  
X:1
L:1/8
M:6/8
K:G
 A | BGG dGG |{d} cAG FGA | BGG B/c/dB | cAF G2 A | BGG dGG | cAG FGA | def gdB |{d} cAF G2 :: B | 
 def{a} gfg | edc BAG | eaa a3 | bge e2 f | def{a} gfg | edc BAB | GBd gdB |{d} cAF G2 :|  