Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:4/4
K:Bmin
['BBBc BAFA BABc dcBc AEEE', 'fecB AEEE ABcB ABcd eBde fBBB aB']  
X:1
L:1/8
M:4/4
K:Bmin
|: BBBc BAFA | BABc dcBc | AEEE ABcB | ABce afec | BBBc BAFA | BABc dcBc | AEEE ABcf |1 
 afec B2 c/B/A :|2 afec B2 de |: fBBB aB g2 | f2 fg fecB | AEEE ABcB | ABcd eBde | fBBB aB g2 | 
 f2 fg fecd | eAAA afec |1 ABcd B2 de :|2 ABcd B4 ||  