Construct a musical work using the letter-based representation of the specified pattern and the given melodic subject.
X:1
L:1/8
M:4/4
K:G
['dBGB dBGB dBdg f2 df', 'dgBg dgBg']  
X:1
L:1/8
M:4/4
K:G
 Bc | dBGB dBGB | dBdg f2 df | ecAc ecAc | edef g2 fe | dBGB dBGB | dBdg f2 df | adfd edBa | 
 A/A/A Bd e2 ef || dgBg dgBg | dgBg f2 df | eaca eaca | edef g2 fe | dgBg dgBg dgBg f2 ed | 
 aefd edBa | A/A/A Bd e2 ef ||  