Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/8
M:2/4
K:D
['f2 ed cB AG FE DC', 'A2 A2']  
X:1
L:1/8
M:2/4
K:D
"D" f2 ed |"G" cB AG |"A7" FE DC |"D" D/C/D/E/ DD | f2 ed |"G" cB AG |"A7" FE DC |"D" D2 D2 || 
"D" a2"G" bg |"D" af"A7" ge |"D" fd cd |"A7" e/d/c/B/ AA |"D" a2"G" bg |"D" af"A7" ge |"D" fd cd | 
"A7" e2 e2 ||"A7" e2 cA | g2 eg |"D" fe/d/ Bc |"A7" e/d/c/B/ AA | e2 cA | g2 eg | 
"D" fe/d/"A7" c/d/e/c/ |"D" d2 d2 ||"D" F2 AF |"A7" E2 GE |"G" DB AG |"D" FE/F/ DD | F/E/F/G/ AF | 
"A7" E/D/E/F/ GE |"G" DE FG |"A7" A2 A2 ||"D" A2 FD |"G" d2 BG |"A7" G2 EC |"F#m" c2 AF | 
"Bm" F2 ED |"G" B2 AG |"A7" FE DC |"D" D2 D2 |]  