Assemble a musical creation that incorporates the furnished motif and conforms to the predetermined alphabetical structure.
X:1
L:1/8
Q:1/2=90
M:2/2
K:C
['cBce gece BGBc dBGB', 'EF GAGE']  
X:1
L:1/8
Q:1/2=90
M:2/2
K:C
 G2 | cBce gece | BGBc dBGB | AGcB AGF"_E added" E | F2 D2 D2 GB | cBce gece | BGBc dBGB | 
 AcGc FAGF |"_NB" E2 C2 C2 :: EF | GAGE cecA | fedc BGAB | ceGc FAGE | F2 D2 D2 EF | GAGE cdec | 
 BGBc defd | e/f/g ec GBdB | c2 c2 c2 :|  