Build a musical arrangement using the indicated alphabet-based system and the given motif.
X:1
L:1/8
Q:1/2=90
M:2/2
K:C
['c2 (ec) edcB c2', 'C2 e2 ge f2 af e2 f3']  
X:1
L:1/8
Q:1/2=90
M:2/2
K:C
 c2 (ec) edcB | c2 ge d4 | c2 (ec) edcB | c2 G2 E2 C2 :: e2 ge f2 af | e2 (ge)"^tr" f3 g | 
 e2 (dc) edcB | c2 G2 E2 C2 :|  