Create a musical piece with the provided alphabetic notation system and theme.
X:1
L:1/8
Q:1/4=100
M:2/4
K:C
['C |[K:D] e Gmaj in f ecae', 'E A<AA<A BEEB A<AA<A aefa ea c/e/d/B/']  
X:1
L:1/8
Q:1/4=100
M:2/4
K:C
 C |[K:D] e G"_Key Gmaj in MS" f | ecae | fBBf | ecae | f3 a | a/g/f/e/ a>e | fBBf | a>fec | A3 :: 
 E | A<AA<A | BEEB | A<AA<A | aefa | ea c/e/d/B/ | BFFf | afec |"^1" A3 :|  