Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/8
Q:1/4=100
M:6/8
K:D
['a2 f', 'Bcd def efd']  
X:1
L:1/8
Q:1/4=100
M:6/8
K:D
{fg} a2 f d3 |{d} cBc d2 A |{fg} a2 f{fg} a2 f |{b} agf f2 e |{fg} a2 f d3 |{d} cBc d2 A | 
{fg} a2 f{fg} a2 f |{a} gfe"^Fine" d3 || faf{f} e^de | dbd{d} cBc | faf{f} e^de | dbd{d} cBc | 
 a^gf fed | dcB Bcd | def efd | cdB"^D.C." A3 |]  