x = 53, y = 14, rule = B34/S34 34bo$34bo15bo$8bo11bo13boo14bobo$16bobobo12bo3boboboboboboo$3bob3o3bob o9bobobobobobo3bobobobobobobo$bob7o3boobobbobobobobobobo17bo$oobboo3b oo3bobbo$oobboo3boo3bobbo$bob7o3boobobbobobobobobobo17bo$3bob3o3bobo9b obobobobobo3bobobobobobobo$16bobobo12bo3boboboboboboo$8bo11bo13boo14bo bo$34bo15bo$34bo! A period 3 c/3 spaceship with a tail that can be shifted. David I. Bell, February 1994