#N whiteboard-17c2415-spaceship.rle
#O yujh, 12 November 2021
#C
#C Expanding and contracting rectangular 'whiteboard' areas with an unusual
#C mechanism in this rule results in an orthogonal 17c/2415 spaceship.
#C
#C Reference:
#C https://conwaylife.com/forums/viewtopic.php?p=179823#p179823
x = 6, y = 9, rule = B2ce3-cinq4iqrt5-cij6-ci78/S1c2cik3anry4-acrwy5-ekr6-i78
bo3bo$3b2o$b4o$4o$4obo$4o$b4o$3b2o$bo3bo!
