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
['B3 cBc', 'bag f3 d(3efg afd cAG g3 dgg']  
X:1
L:1/8
M:6/8
K:G
 B3 cBc | ded cAG | F3 DEF | DGG (3EFG A | B3 cBc | dcA (3B^cd e | (3gfe d cAG |1 G3 G2 A :|2 
 GAG GBd || g3 dgg | gfg bag | f3 d(3efg | afd cAG | g3 dgg | gfg b2 a | f2 d cAG | AGG GBd :|  