Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/8
M:4/4
K:C
['B2 Bd', 'AB cd']  
X:1
L:1/8
M:4/4
K:C
 A2 GA B2 Bd | cBAG ABcd | AAGA B2 Bd |1 ccBB A4 :|2 cc B2 ABcd |: e2 ce f3 e | (3ddd cd e2 c2 | 
 A2 GA B2 Bd | cB AG AB cd | ec eg ag fe | dG (3GGG ef ed | c2 cA BG Bd |1 cc B2 AB cd :|2 
 cc B2 A4 ||  