Create a composition by utilizing the given alphabet-based musical pattern and the provided melodic theme.
X:1
L:1/8
M:6/8
K:A
['c2 B', 'a3 afe fff f2 e', 'AAA A2', 'c2 B Aaa fec e3']  
X:1
L:1/8
M:6/8
K:A
 f | aaa faa | fee c2 B | AAA A2 B | cee e2 c | f3 fec | eff c2 B | Aaa fec | e3 e2 :| f | a3 afe | 
 fff f2 e | c3 cff | ecB c2 e | a3 afe | fff f2 e | Aaa fec | e3 e2 :| a | AAA A2 c | ecB c2 e | 
 fff f2 e | cfe c2 B | AAA A2 B | cee c2 B | Aaa fec | e3 e2 :| f | aAa fdf | eAa c3 | dff cee | 
 Acc B2 e |1 aAa fdf | eAa c2 B | Aaa fec | e3 e2 :|2 a2 f ecB | cfe c2 B | Aaa fec | e3 e2 ||  