Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
Q:1/4=120
M:4/4
K:A
['(ub/a/g/f/) ve>vAuc>uA (vF<A)uE>uD C>EA>g a2 (b/a/g/f/) ve<Ac>uA', 'A2 uE2 vC<uEvE>uG vA<uEvE>uD C<EA>B c2 (d/c/B/A/)']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:A
"^Strathspey." (ub/a/g/f/) | ve>vAuc>uA (vF<A)uE>uD | C>EA>g a2 (b/a/g/f/) | ve<Ac>uA (F<A)E>C | 
 E/F/G/A/ B>G A2 (ub/a/g/f/) | ve>vAuc>uA (vF<A)uE>uD | C>EA>g a2 (b/a/g/f/) | ve<Ac>uA F<AE>C | 
 E/F/G/A/ B>G A2 || uE2 | vC<uEvE>uG vA<uEvE>uD | C<EA>B c2 (d/c/B/A/) | C<EE>G A<EE>C | 
 E/F/G/A/ vB>vA A2 AE | C<EE>G A<EE>D | vC>vEuA>ug a2 (b/a/g/f/) | (3ece (3fdf (3geg ua>uf | 
 e/f/g/a/ b>g a2 |]  