Create a musical composition based on the alphabetic representation of the predetermined pattern and the given melodic theme.
X:1
L:1/4
Q:1/4=170
M:4/4
K:G
['A B', 'd e/f/ g']  
X:1
L:1/4
Q:1/4=170
M:4/4
K:G
"^A" G A B G | c d e2 | A B c d/c/ | B c d e/f/ | g d B/A/ G | c/d/ e/c/ d2 | c/d/ e d/e/ f | 
 g2 g2 ||"^B" g a b g | f g a d | e f g a/g/ | f e d e/f/ | g d B/A/ G | c/d/e/c/ d d | 
 e/f/ g f/g/ a | g2 g2 ||  