Build a musical number by combining the given character designation and the presented melodic structure.
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
['GB B2 G3 A FAAG FADF GBBA', '', 'gb b2']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
 F | GB B2 G3 A | FAAG FADF | GBBA GBdg | fgaf gedB | GB B2 G3 A | FAAG FADF | GBBA GBdg | 
 fgaf g3 :| f |: gb b2 affg | agef gede | gb b2 faag | agef g3 f | gb b2 affg | agef gede | 
 g2 bg faag | agef gedB :|  