Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/16
Q:1/8=32
M:3/8
K:F
['AB c2f2', 'g2b2 ag f2a2', 'AB c2A2f2 d2B2G2']  
X:1
L:1/16
Q:1/8=32
M:3/8
K:F
 c2 | AB c2f2 | AB c2f2 | efgabg | a2f2c2 | AB c2f2 | AB c2f2 | efgabg | f4 :: c2 | bg g2b2 | 
 ag f2a2 | gfedga | f2c2c2 | ba g2b2 | ag f2a2 | gfefga | f4 :: AB | c2A2f2 | d2B2G2 | E2c2B2 | 
 B2A2 AB | c2A2f2 | d2B2G2 | E2cBAG | F4 :|  