Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
Q:1/8=150
M:2/2
K:A
['a2 AB', 'A2 AB ceef edcA ceef e2 dc']  
X:1
L:1/8
Q:1/8=150
M:2/2
K:A
 fg | a2 AB cBAB | cdec A2 ef | g2 GA BAGA | BcdB GBdg | a2 AB cBcd | edef gedB | cdeg aefd | 
 cABG A2 :| AB | ceef edcA | ceef e2 dc | Bdde dBGA | Bcde dcBd | ceec BeeB | cABG ABcB | 
 Aceg aefd | cABG A2 :|  