Generate harmonious tunes by incorporating the specified letter-based framework and the presented motif.
X:1
L:1/8
M:4/4
K:Bb
['B2 BF DEFD', 'B2 fB']  
X:1
L:1/8
M:4/4
K:Bb
 F2 |:"Bb" B2 BF DEFD |"Gm" B2 BG"F7" ABcd |"Bb" B2 BF DEFD |"Cm" Cc cB"F7" ABcd |"Bb" B2 BF DEFD | 
"Gm" BdBG"F7" ABcd |"Bb" BfdB FDFD |"Cm" Cc cB"F7" ABcd |"Bb" B2 fB dB f2 |"Bb" B2 fB defb | 
"Bb" B2 fB dB f2 |"Cm" edcB"F7" ABcd |"Bb" B2 fB dB f2 |"Bb" Bbfe defg |"Bb" fdec"Gm" dBcA |1 
"Eb" BGFD"F7" Cccd :|2"Eb" BG"F7"FD"Bb" B,4 |]  