Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:2/2
K:G
['GFGB A2 dc', 'gfef g2']  
X:1
L:1/8
M:2/2
K:G
 GFGB A2 dc | BdAc BEEF | GFGB A2 dc | BGAG FDEF | GFGB A2 dc | (3Bcd Ac BEEF | G2{A} GF GAB^c | 
 dBAG FD D || f | gfef g2 ef | geag fddf | gfef gfed | BdAG FDDf | gfef g2 bg | fgag fddf | 
 gbaf gfed | (3B^cd AG FDEF ||  