Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:6/8
K:G
['D G>AG B2', 'g2 d B2']  
X:1
L:1/8
M:6/8
K:G
 D | G>AG B2 G | c2 A F2 D | G>AG B2 c | d2 g B2 c | dgd =f2 d | cAG F2 A | d>ed cBA | G3 G2 :| d | 
 g2 d B2 G | c2 A F2 D | g2 d B2 ^c | dde =f2 e | dgd =f2 d | cAG F2 A | d>ed cBA | G3 G2 :|  