x = 23, y = 10, rule = B3678/S34678
16bo3bo$4bob3o5bobbooboo$bboboo9bo$3bob6obob3o3bobo$oobo4bobbobbo7bo$
oobo4bobbobbo7bo$3bob6obob3o3bobo$bboboo9bo$4bob3o5bobbooboo$16bo3bo!
A period 3 c/3 orthogonal spaceship.
David Eppstein, April 1998
