Compose tunes based on the given letter-based musical structure and the supplied motif.
X:1
L:1/16
M:2/4
K:Amin
['.[ec]2 .[ec]2']  
X:1
L:1/16
M:2/4
K:Amin
"Am" c4 cddc | cddc"E7" cBBA |"Am" c4 cddc |"E7" cBBA"Am" A4 |"Am" [cE]4 [cE][dF][dF][cE] | 
 [cE][dF][dF][cE]"E7" [cE][BD][BD][AC] |"Am" [cE]4 [cE][dF][dF][cE] | 
"E7" [cE][BD][BD][AC]"Am" [AC]4 |"G7" defd"C" e4 | .[ec]2 .[ec]2 .[ec]2 z2 |"G7" Bcdc d4 | 
"G" .[BG]2"D7" .[cA]2"G" .[dB]2 z2 |"G7" gfed"C" e4 | .[ec]2 .[ec]2 .[ec]2 z2 |"G7" Bcdc d4 | 
"G" .[BG]2"D7" .[cA]2"G" .[dB]2 z2 |"G7" GAB2"C" cde2 |"E7" dcB2"Am" A4 |"C" cGGc"Bb" c_BBA | 
"Am" A8 |"G7" GAB2"C" cde2 | gfe2"Dm" d4 |"C" cGGc"Bb" c_BBA |"Am" A8 |]  