Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
Q:1/4=100
M:2/4
K:C
['G2 G/A/B/c/ d2 B2 Ad', 'B2 BB G2 GG c2 cc', 'B2 BB c2', 'G2 DB']  
X:1
L:1/8
Q:1/4=100
M:2/4
K:C
 C |[K:G] Ca Maa vebe D | G2 G/A/B/c/ | d2 B2 | Ad Ad | B/c/B/A/ GD | G2 G/A/B/c/ | d2 B2 | Ad fe | 
 d2 z :| A | B2 BB | G2 GG | c2 cc | A2 AA | B2 BB | G2 GG | c2 cc | A3 || A | B2 BB | c2 BB | 
 A2 AA | B2 G2 | B2 BB | c2 B2 | A2 AA | G3 || D/D/ | DD/D/ DD/D/ | DD/D/ DD/D/ | G2 DB | G2 DB | 
{d} cA{d} cA |{d} cA{d} cA | G2 DB | G2 DB |{d} cA{d} cA |{d} cA{d} cA | BG/B/ d2 | BG/B/ d2 | 
 BG/G/ GG/G/ | GG/G/ Gd/d/ | dB/B/ Bg/g/ | gd/d/ dg/g/ | bb (a/g/f/e/) | e2 dd/d/ | dB/B/ Bg/g/ | 
 gd/d/ dg/g/ | bb a/g/f/a/ | g/f/g/b/ a/f/d/f/ | g/f/g/b/ a/f/d/f/ | gg/g/ gg | g2 z |]  