Craft a musical composition that adheres to the specified musical theme and letter-based structure.
X:1
L:1/8
Q:1/8=90
M:7/8
K:Amin
['c2 A e2 (dc)', 'd2 c d2 df g2 g B2', 'a2 b', '(gf) a2 b (ag) (gf)', 'G2 d B2 cA ac A2 f', 'cc/ B2 B2 BB/ BB/ c2 c2', 'B2 c2']  
X:1
L:1/8
Q:1/8=90
M:7/8
K:Amin
"_as written,see note,no key/time sig in ms" c2 A e2 (dc) | B2 G d2 (cB) | c2 A e2 (dc) | 
 A2 f2 e d2 :: c d2 df g2 | g B2 c2 (ee) | (fg) a2 a A2 :: a2 b (ag) (gf) | e2 g2 g B2 | 
 a2 b (ag) (gf) | e2 a2 a A2 :|"^'play this part but once'" a2 b (ag) (gf) | a2 b (ag) (gf) | 
 a2 b (ag) (gf) | g4 f g2 | a2 a/g f2 e/d |: cA ac B G2 | d B2 cA ac | A2 f e2 d2 :: 
 c2 c2"^1" cc/ cc/ | B2 B2 BB/ BB/ | c2 c2 cc/ cc/ | A2 f e2 d2 :: c2 (ee) edc | B2 c2 d B2 | 
 c2 (ee) edc | A2 f e2 d2 :|  