Try 1: (6 classes)
class Test$C$B1
class Test$C$B2
class Test$C$B3$
class Test$C$B4$
class Test$C$B5$
class Test$C$B6$
Try 2: (6 classes)
class Test$C$B1
class Test$C$B2
class Test$C$B3$
class Test$C$B4$
class Test$C$B5$
class Test$C$B6$
Try 3: (6 classes)
class Test$C$B1
class Test$C$B2
class Test$C$B3$
class Test$C$B4$
class Test$C$B5$
class Test$C$B6$