Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:2/4
K:G
['e d2', 'ca fa cd/c/ Bg bg BA/B/ cf', "c>d ec c'2 b>a gB dd' b/d/"]  
X:1
L:1/8
M:2/4
K:G
"^A" c3 B | A2 c2 | a2 d2 | b3 a | g2 d2 | g4 | f3 e | d2 f2 | cd ba | g3 e | d2 g2 | !fermata!B4 | 
 c3 B | A2 c2 | a2 d2 | b3 a | g2 d2 | g4 | f3 e | d2 f2 | cd bg | !fermata!g4 || 
[M:3/4]"^B" ca fa cd/c/ | Bg bg BA/B/ | cf af c/d/ b/a/ | g>e dg B2 | ca fa cd/c/ | Bg bg BA/B/ | 
 cf af c/d/ b/a/ | g4 z2 ||[M:3/4]"^C" c>d | ec c'2 b>a | gB dd' b/d/ b/g/ | fA dd' c'/d/ b/a/ | 
 gB d2 c>d | ec c'2 b>a | gB dd' b/d/ b/g/ | fA dd' c'/d/ b/a/ | g4 z2 |]  