Develop tuneful melodies adhering to the specified letter notation and including the supplied thematic aspect.
X:1
L:1/8
Q:1/2=90
M:2/2
K:Bb
['BFDE FAce dfdB A2 GF', 'A2 GF']  
X:1
L:1/8
Q:1/2=90
M:2/2
K:Bb
"^s-q in ms" BA | BFDE FAce | dfdB A2 GF | EGcB AcdB | Cced dcBA | BFDE FAce | dfdB A2 GF | 
"^tr" E3 g fdcB | F2 A2 B2 ::"^q in ms" g2 | fgab fdcB | egec{B} A2 GF | EGcB AcdB | 
 Cced c2 (fg/a/) | bfdB Fafd | Egec{B} A2 GF |"^tr" E3 g fdcB | FBAc B2 :|  