Build a musical number by combining the given character designation and the presented melodic structure.
X:1
L:1/8
M:4/4
K:D
['', 'AB AF', 'F2 D2']  
X:1
L:1/8
M:4/4
K:D
 FG |: AB AF A2 de | fg fe d3 A | Bc dB AB AF | G2 E2 E2 FG | AB AF A2 de | fg fe d3 A | 
 Bc dB AB AG |1 F2 D2 D2 FG :|2 F2 D2 D2 ag |: fe fg af df | fe fg a2 gf | g2 bg f2 af | 
 g2 e2 e2 FG | AB AF A2 de | fg fe d3 A | Bc dB AB AG |1 F2 D2 D2 ag :|2 F2 D2 D4 |]  