Assemble a musical creation that incorporates the furnished motif and conforms to the predetermined alphabetical structure.
X:1
L:1/8
M:2/4
K:F
['defd dccc']  
X:1
L:1/8
M:2/4
K:F
 FGAB | c2 cc | defd | dccc | defd | dccc | cBBB | A2 A2 | c2 GG | G2 FC | FGAB/B/ | cccc | defd | 
 dccc | defd | dccc | cBBB | AAAA | ccGG | GGF z | FGAB | c2 f2 | c2 z2 | ccBB | A2 AA | c2 G2 | 
 F2 z2 |]  