Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:2/2
K:D
['G FA-AB AdAG FA-AB{c} d2 (dA) FA-AB', 'g2 (gb) fdad']  
X:1
L:1/8
M:2/2
K:D
 G | FA-AB AdAG | FA-AB{c} d2 (dA) | FA-AB AdAF | EET=cE{F} G2 G :| g | fdad fdda | 
 fdad{f} g2 (gb) | fdad bdad | eebe{f} g2 (gb) | fdad fdda | fdad gbag | fdec{c} dBAF | 
 EE=cE{F} G2 G ||  