Construct a musical work that combines the specified alphabet-based pattern with the given melodic theme.
X:1
L:1/8
M:4/4
K:Amin
['AB cB', 'cB AG']  
X:1
L:1/8
M:4/4
K:Amin
 AB cB AG EG | AB cB AB GB | AB cB AG EG | DE GB A2 AG :| D2 dc BA GB | cB AG AB GE | 
 D2 dc BA GB |1 cB AG AB GE :|2 cB AG A2 AG ||  