Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/16
Q:1/4=50
M:2/4
K:F
['A2 A2']  
X:1
L:1/16
Q:1/4=50
M:2/4
K:F
 A2 A2 (Ad) c2 | A2 A2 (cB) G2 | (EG) (GB) A2 (Ac) | c6 z2 | A2 A2 (Ad) c2 | A2 A2 (cB) G2 | 
 F2 (F^F) (GB) (AG) | F6 z2 | (cde) A f2 c2 | (Bd) (cB) A4 | G2 A2 (cBA) G | F2 E2 F4 |]  