Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:3/4
K:G
['B4 (3ABc B2 A2 G2 d4 (3cde', 'A4 d4 (3cde A2 B2 c2 E2']  
X:1
L:1/8
M:3/4
K:G
 B4 (3ABc | B2 A2 G2 | d4 (3cde | d2 c2 B2 | d2 cBAG | FG AB cB | B2 A4 :: d4 (3cde | A2 B2 c2 | 
 E2 A2 G2 | F2 EF D2 | GBAc B2 | cgfa g2 | (3edc B2 A2 | G6 ||  