Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
M:4/4
K:F
['AB cFAc dFBd cFAc f2 ef', "F2 ef gceg bceb acfg acfa gc'ba"]  
X:1
L:1/8
M:4/4
K:F
 AB | cFAc dFBd | cFAc f2 ef | gceg bgag | (3fag (3fed c2 AB | cFAc dFBd | cFAc f2 ef | gcbg ecBG | 
 (3FGF EG F2 :: ef | gceg bceb | acfg acfa | gc'ba gfed | (3ded c'2 c2 A,B, | (3CDC A,C Fac^c | 
 (3ded Bd fdfb | acfa gceg | (3fgf eg f2 :|  