Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
['gdBd c2 AB cedc B2 A2 GBdg', 'bg g2 bgag']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
 D | G2 Bd gdBd | c2 AB cedc | B2 A2 GBdg | ecAF GDB,D | G2 Bd gdBd | c2 AB cedc | B2 A2 GBdg | 
 ecAF G2 (3Bcd | gbaf gdBd | c2 AB cedc | B2 A2 GBdg | ecAF GDB,D | G2 Bd gdBd | c2 AB cedc | 
 B2 A2 GBdg | egfa g3 || a | bg g2 bgag | egdg egdg | bg g2 bgag | fdfa g3 a | bg g2 bgag | 
 egdg egdg | bgaf gfed |1 (3Bcd ef g3 :|2 (3Bcd ef g2 ef | g2 gf g4 |]  