Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
Q:1/4=110
M:2/2
K:C
['(GBd) z (Gce)', 'cC/C/ EG']  
X:1
L:1/8
Q:1/4=110
M:2/2
K:C
 C2 EG c/c/c/c/ e/e/e/e/ | g/g/g/g/ c'/c'/c'/c'/ g3 e | (g>f) (d>f) (f>e) (c>e) | 
 (e>d) (c>d) cBAG | C(D/E/) F/G/A/B/ c/d/e/f/ g/a/b/c'/ | ggaa g2 ^f2 | (3gdg f/e/d/c/ B2"^tr" A2 | 
"^rest added" z"_p" (GBd) z (Gce) | z (GBd) z (Gce) |"_f" d/e/^f/g/ f/e/d/c/ B2"^tr" A2 | 
 G>G D>D B,>B, D>D | G,G,/G,/ B,D G2 z2 :: G2 B>d f2 z2 | f2 d>B F2 z2 | 
 E/E/E/E/"^sic--" !//!E2 !//!c2 !//!c2 !//!e2 !//!e2 !//!g2 !//!g2 | c'3 b a2 z2 | a3 g f2 z2 | 
 f>ag>f f>ed>c | g2 G>G G2 z2 |{gefg} d2 d2 d4 |{fede} c2 c2"^tr" c4 | A>BcA GFED | 
"_f" C2 EG !//!c2 !//!e2 | !//!g2 !//!c'2 g3 f | fedc edcB | cC/C/ EG cC/C/ EG | c2 c2 c2 z2 :|  