Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/8
M:4/4
K:A
['E<C E<AA>.c', 'e>Ac>A [A,E]>Ac>A f/e/d/c/ Bc']  
X:1
L:1/8
M:4/4
K:A
 c | (A,>B,)(C>D) (E>F) E<(C | A,>)C E<C E<AA>.c | (A,>B,)(C>D) E>F E<C | 
 B,>B (d/c/)(B/A/) G<BB>.c | A,>B,(C>D) E>F E<C | (A,>C) E<C E<AA>.c | ecAE Fdfe | dcBA GBB || c | 
 A<A{AB} c>A e>Ac>A | [A,E]>Ac>A f/e/d/c/ Bc | A<A{AB} c>A eAcA | F>A (F/E/)(D/C/) B,BB.c | 
 A<Ac>A e>Ac>A | [A,E]>Ac>A f/e/d/c/ Bc | A>c A<E F>A F<D | E>DC>B, A,AA ||  