Construct harmonious tunes in line with the outlined letter symbolism and the presented thematic component.
X:1
L:1/4
M:3/4
K:Bb
['B A']  
X:1
L:1/4
M:3/4
K:Bb
 F | B3/2 c/d/B/ | F3/2 D/E/F/ | G3/2 A/B/G/ | F E D | E G F/E/ | D F B | d/c/ B A | B2 B/c/ | 
 d B f | c B A | B G c | A F F | G3/2 A/B/G/ | F B d | d/c/ B A | B2 |]  