Twin bees shuttle on 21P4.1
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x = 41, y = 14, rule = B3/S23 17b2o$2o15bobo7b2o$2o17bo7b2o$17b3o2$34b2o$34bobo$17b3o18b2o$2o17bo15bo2bo$2o 15bobo18b2o$17b2o14bobobo2bo$35b2o2b2o$32bob2o$33bo!