Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/8
M:6/8
K:Bmin
['fBB fBB', 'fBB fBB', 'de f2 a2 gf', 'fBB ecA']  
X:1
L:1/8
M:6/8
K:Bmin
|: fBB fBB | e2 c2 Ae | fBB fBB | A2 c2 Ae | fBB fBB | e2 c2 ce | fBB ecA |1 B6 :|2 B4 de |: 
 f2 a agf | e2 g gfe | d2 f fed | e2 c2 A2 | f2 a2 gf | e2 g2 fe | fBB ecA |1 B4 de :|2 B6 |: 
 fBB fBB | eaa aAe | fBB fBB | Aaa aAe | fBB fBB | eaa ace | fBB ecA |1 B6 :|2 B4 de || f2 a2 gf | 
 ecc cfe | ddd dcB | c2 A2 de | f2 a2 gf | e2 g2 fe | fBB ecA | B4 de | fAa Agf | ecc cfe | 
 dAf Aed | eAA ABA | fAa Agf | eAg Afe | fBB ecA | B6 ||  