Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:4/4
K:A
['c2 B<A', 'a2 e>f', 'e>d c>AA>c c<eA>c d>AA>d d<fA>d c>AA>c', 'f>g a>ga>e c<ec<A d>fd>B c<ec<A']  
X:1
L:1/8
M:4/4
K:A
 e>d | c2 B<A A>B c<e | d>ef>g a>e f<a | c2 B<A A>ce>c | f>ed>c B2 e>d | c2 B<A A>B c<e | 
 d>ef>g a>e f<a | c>AA>c c<ed>B | c2 A2 A2 :: f>g | a2 e>f e>Ae>c | a2 c<e f>ed>c | 
 a2 e>f e>A c<e | f>ed>c B2 f>g | a2 e>f e>Ae>c | a2 c<e a2 e>d | c>AA>c c<ed>B | c2 A2 A2 :: e>d | 
 c>AA>c c<eA>c | d>AA>d d<fA>d | c>AA>c c<Ac<e | f>ed>c B2 e>d | c>AA>c c<eA>c | d>AA>d d<fA>d | 
 c>AA>c c<ed>B | c2 A2 A2 :: f>g | a>ga>e c<ec<A | d>fd>B c<ec<A | d<fB>d c<eA>c | f>ed>c B2 f>g | 
 a>ga>e c<ec<A | d>fd>B c<ec<A | c>AA>c c<ed>B | c2 A2 A2 :|  