Construct a musical arrangement that blends the supplied motif while maintaining the specified alphabetical order.
X:1
L:1/4
Q:1/2=112
M:none
K:Bb
['A F']  
X:1
L:1/4
Q:1/2=112
M:none
K:Bb
|:"^A""Gm" B2"^/" B2 |"Cm" c/B/A/G/"F" A F |"Eb" G G"Bb" F B |"F" B A"Bb" B2 |: |: 
"^B""Cm" c/B/A/G/"F" A F |"Cm" c/B/A/G/"F" A F |"F" F z |"^/" F z |"F" F z |:  