Write a musical work incorporating the specified theme and letter-based framework.
X:1
L:1/8
M:2/4
K:E
['B4- B2']  
X:1
L:1/8
M:2/4
K:E
 B B2 B/e/ | f4- | f4 | fe/f/e/c/ B3 fe/f/ec/B/ | c4- | c4 | ec/e/cB | B4- | B2 z2 | G B2 G | 
 B2 BB | B4 | fc/e/cB | c4- | cfcB | B>Bc/e/c | B4- | B2 z2 |]  