Construct harmonious tunes in line with the outlined letter symbolism and the presented thematic component.
X:1
L:1/8
M:6/8
K:D
['B>dd A>dd', 'A>ff f>ef a>ff f>ed', 'G>gg g>fg', 'B>dd d>ee']  
X:1
L:1/8
M:6/8
K:D
|: B | A>dd d>cd | B>dd A>dd | B>dd A>dd | c>ee e>dB | A>dd d>cd | B>dd A>dd | B>dd c>de | 
 f>dd d2 :: B | A>ff f>ef | a>ff f>ed | B>ee e>de | f>ee e>dB | A>ff f>ef | a>ff f>ed | B>dd c>de | 
 f>dd d2 :: A | G>gg g>fg | a>ge g>dB | G>gg g>fg | a>ge g2 B | G>gg g>fg | a>gf g>dB | B>ee e>fg | 
 f>ed e2 :: A | G>AB B>dd | d>ee e>dB | G>BB B>dd | d>ee e>gg | G>BB B>dd | d>ee e>dB | B>ee e>fg | 
 f>dd e2 :|  