Produce a musical expression that follows the indicated alphabetical structure while integrating the provided thematic material.
X:1
L:1/4
M:3/4
K:Bb
['B2 z']  
X:1
L:1/4
M:3/4
K:Bb
"^1" (B F) d | c2 z | (c F) e | d2 z | d2 d | (e d) c | (B c) A | B2 z |"^2" (D F) B | A2 z | 
 (A F) c | B2 z | B2 B | (G F) E | (D E) C | D2 z |"^3" (B, D) B, | F2 z | (F A) F | B2 z | 
 (B/A/ G/F/) E/D/ | (C D) E | F2 F | B,2 z |]  