Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:6/8
K:C
['(c/d/) e>fe d2 c B>cA ^G2 E', "A2) (c/d/) e2 c'{c'} b2 a (g<e)a"]  
X:1
L:1/8
M:6/8
K:C
 (c/d/) | e>fe d2 c | B>cA ^G2 E | A>Bc({e} d<B)^G | (A3 A2) :| (c/d/) | e2 c'{c'} b2 a | 
 (g<e)a g2 e | c>dc gfe | d>ec B z G | c>Bc d>cd | e2 A !fermata!G2 E | A>Bc({e} d<B)^G | 
 (A3 A2) |]  