Assemble a musical creation that incorporates the furnished motif and conforms to the predetermined alphabetical structure.
X:1
L:1/8
M:4/4
K:A
['', '(3(efg a2)', 'c2 [ce]2 cdec']  
X:1
L:1/8
M:4/4
K:A
 (A2 |: [A,A]2) (3(efg a2) (f2 | e2 c2- c2) (A2 | A2) (3(efg a2) f2 | (ec)Ac e3 (f | 
 e2) (A2 A2) (3(efg | a2) f2 (ec)Ac | e3 (e-ef)ec | B2 G2 A3 (B |1[M:2/4] A2) A2 :|2 A2 (AB || 
[M:4/4] c2) [ce]2 cdec | d2 [df]2 ddfd | c2 [ce]2 cdec | B2 Bc B2 AB | c2 [ce]2 cdec | 
 d2 [df]2 ddfd | efec B2 G2 |1 A3 (B A2) AB :|2 A3 B A4 ||  