B2ac3nr4n5r to B2acn3nr4cn5r

oooo.o.oo
.........
...o.....

B2ac3nr4nt5er to B2acn3nr4cnt5er

oooo.o.oo
.........
...oo....

B2ac3nr4n5er to B2acn3nr4cn5er

ooooo.o.oo
..........
.o........

B2ac4cyz5r to B2acn4ctyz5r6i

ooo.ooo.oo
..........
..........