Construct melodies utilizing the provided motif and adhere to the outlined musical structure.
X:1
L:1/8
Q:1/4=110
M:2/4
K:F
['aa ab a3 b ag', 'A2 FC B2'  
X:1
L:1/8
Q:1/4=110
M:2/4
K:F
 c | aa ab | a3 b | ag fe | f/e/f/g/ f>c | aa ab | a3 b | ag fe | f3 :: z | A2 FC | B2 GE | 
 c=B/c/ dg | f2 e2 | A2 FC | B2 GB | AG FE | F3 :|  