Compose a music piece that includes the specified motif while adhering to the outlined alphabetical sequence.
X:1
L:1/8
M:4/4
K:C
['A>B a4', '[Ec]6 (3E3/2F/^F G>FE>F', '(3cde d>cF>G A2 B2 a2']  
X:1
L:1/8
M:4/4
K:C
 (3ef^f | (3gea (3gec G2 ^G2 | A>a (3^gab a3 (^a | (3b)ab (3aba (3gag (3fBd |1 A>B a4 (3ege | G6 :| 
[M:5/4] A>B a4 [GB]4 |[M:4/4] [Ec]6 || (3E3/2F/^F | G>FE>F G2 (3cde | d>cF>G A2 !slide!d>c | 
 B2 a2 g3 (^d | (3e3/2)c/A G>A G>F |[M:2/4] E2 (3E3/2F/^F |[M:4/4] G>FE>F G2 (3cde | 
 d>cF>G A2 !slide!d>c | B2 a2 g2 (3GAB | c>EG>B, C4 ||  