Assemble a musical creation that incorporates the furnished motif and conforms to the predetermined alphabetical structure.
X:1
L:1/4
M:3/4
K:Amin
['G A B']  
X:1
L:1/4
M:3/4
K:Amin
 E | A A B/A/ | G A B | e d/c/ B/G/ | E ^G A | A A B/A/ | G A B | e/^f/ g/f/e/d/ | B2 c/d/ | 
 e a a | e ^f g | B/c/ d/c/B/A/ | G A B | A A B/A/ | G A B | e d e | A2 ||  