Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
M:2/4
K:F
['Ac c/d/c Bd d/e/d c/d/e/f/', 'd/e/f ec c/d/e dA=BG', '(B/c/) ddcB (BA) A2 Ag (g/^f/g/a/) (gf)dB']  
X:1
L:1/8
M:2/4
K:F
|:!p! Ac c/d/c | Bd d/e/d | c/d/e/f/ ge | f/e/f/g/ a/f/c/B/ | Ac c/d/c | Bd d/e/d | 
 c/d/e/f/ g/c/d/e/ | faf z ::!f! !fermata!gd d/e/f | ec c/d/e | dA=BG | c/=B/c/d/ e/d/e/f/ | 
 gd d/e/f | ec c/d/e | dA=BG | cec z ::[K:Bb]"_p 2nd f" F3 D | F3 (B/c/) | ddcB | (BA) A2 | 
 Ag (g/^f/g/a/) | (gf)dB | dcG (^F/G/) | dcAG | F3 D | F3 (B/c/) | ddcB | (BA) A2 | 
 Ag (g/^f/g/a/) | (gf)dB | dcGA | B3"_D.C." z :|  