Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/4
M:4/4
K:C
['a a', 'B ^c']  
X:1
L:1/4
M:4/4
K:C
 vA A A A | B B B B | ^c ^c ^c ^c | d d d d | e e e e | ^f ^f ^f ^f | ^g ^g ^g ^g | a a a a | 
 a a a a | ^g ^g ^g ^g | ^f ^f ^f ^f | e e e e | d d d d | ^c ^c ^c ^c | B B B B | A A A A |] 
 vA B A B | A B A B | B ^c B ^c | B ^c B ^c | ^c d ^c d | ^c d ^c d | e ^f e ^f | e ^f e ^f | 
 ^f ^g ^f ^g | ^f ^g ^f ^g | ^g a ^g a | ^g a ^g a |]  