Compose a piece of music by integrating the assigned letter representation and provided tune.
X:1
L:1/8
M:4/4
K:G
['', 'AB c4 B4 BAGE GAAB c4 d4', 'AB A2 AG EEEG AAAG E2 EG', 'AB c2 e2 B2 e2 A2 AG']  
X:1
L:1/8
M:4/4
K:G
 AB |: c4 B4 | BAGE GAAB | c4 d4 | e6 eg | a3 b ag e2 | edef g3 g | gedB BAGE | G/ A6 AB :| 
 A2 AG EEEG | AAAG E2 EG | A3 B c2 d2 | e6 eg | a3 b ag e2 | edef g3 g | gedB BAGE | G/ A6 AB :| 
 c2 e2 B2 e2 | A2 AG AGE/F/G | A3 B c2 d2 | e6 eg | a3 b ag e2 | e_e=ef g2 gg | gedB BAGE | 
 G/ A6 AB :|  