Compose a piece of music using the specified alphabetical notation system and the provided theme.
X:1
L:1/8
M:6/8
K:A
['E AGA BAB cBA B2 B', 'c def fed cde edc dcd', 'B =cBA', 'z z AB', 'B>cB>F dB/d/ fd/f/ ge/g/ af/a/ bb b2', 'c>dee (e/d/)(g/f/) (f3/2e/4d/4) Bc/d/ e/f/g/a/ b/a/b/a/ bB', 'F2 f2 dB GBGE g2', 'AcAF f2 dB f2 b/g/b/g/ fDEF B,2']  
X:1
L:1/8
M:6/8
K:A
 E | AGA BAB | cBA B2 B | cBc FBA | GEE E2 E | AGA BAB | cBA B2 B | cBA cBA | eee e2 :: c | 
 def fed | cde edc | dcd FBA | GEE E2 c | def fed | cde edc | dcd Bed | cAA A2 :: B | =cBA cBA | 
 BEE E2 B | =cBA d2 c |{=c} B3 ABc | =cBA cBA | B2 E E2 a | ed=c BA^G | A3- A2 :: =c/d/ | 
 e2 e e=fe | d2 z z AB | =c2 c cdc | B2 z z AB | =cBA edc | a^ga a=fd | ed=c BA^G | A3- A2 :: 
[M:2/4][K:Bb]"_P." B>cB>F | dB/d/ fd/f/ | ge/g/ af/a/ | bb b2 |"_F." b/b/B/B/ f/f/F/F/ | 
 G/G/A/A/ B/B/B,/B,/ | C/C/D/D/ E/E/=E/E/ | FF F2 ::"_P." c>dee | (e/d/)(g/f/) (f3/2e/4d/4) | 
 c>dee | (e/d/)(g/f/) (f3/2e/4d/4) |"_F." Bc/d/ e/f/g/a/ | b/a/b/a/ bB | Ge/c/ BA | BB B2 :: 
 B/c/d/c/ B/A/G/F/ | G/A/B/A/ G/F/E/D/ | E/F/G/F/ E/D/C/B,/ | FF F2 :: f2 dB | GBGE | g2 ec | 
 AcAF | f2 dB | f2 b/g/b/g/ | fDEF | B,2 B,2 :|  