Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/4
Q:1/4=100
M:4/4
K:G
['D G A F D B2 c', 'd B', 'c d B d/c/ A G3 d/e/', 'B d G D/E/ =F3 D G']  
X:1
L:1/4
Q:1/4=100
M:4/4
K:G
"^(Editorial suggestion" D | G A F D |"^(a)" B2 c c | d B (d/c/) A | G3 :| d/e/ | =f3/2 e/ d/c/ B | 
 c e d B | d G G"^(b)" D | =F3 D | G A"^(c)" F D/D/ |"^(d)" c2 A/B/ c | d B (d/c/) A | G3 |: D | 
 G A F D |"^(a) var." B B A/B/ c | d B d/c/ A | G3 :| d/e/ | =f3/2 e/ d/c/ B | c e d B | 
 d G G"^(b) var" D/E/ | =F3 D | G A"^(c) var." c D |"^(d) var." B B c2 | d B d/c/ A | G3 |]  