x = 204, y = 207, rule = B3678/S34678
198bo$197b3o$196b5o$197b3o$194b9o$193bob7obo$194b9o$195b7o$194b9o$194b
oob3oboo$196bobobo$198bo$197b3o$197b3o$196b5o$196b5o$195b7o$196b5o$
196b5o$196bo3bo$178bo$177b3o$176b5o16b3o$177b3o17b3o$174b9o13b5o$173bo
b7obo12b5o$174b9o14b3o$175b7o14b5o$174b9o13b5o$174boob3oboo12b7o$176bo
bobo14b7o$178bo17b5o$177b3o16booboo$177b3o$176b5o$176b5o$175b7o$176b5o
$176b5o$176bo3bo$158bo$157b3o$156b5o16b3o$157b3o17b3o$154b9o13b5o$153b
ob7obo12b5o$154b9o12b7o$155b7o13b7o$154b9o11b9o$153bob7obo11b7o$154bob
5obo12booboboo$154bobobobobo8$137b3o$138bo$86b3oboo15bo12boo14b5o$86b
5obo5bo8bo5bo5boo16b3o$84b8o4b5o5bo4bobobo3boobo13b5o$83bob7obb7obobob
oo4bob3o3b5o12b3o$83b19ob4o3boobbobobb5o13b3o$83bob7obb7oboboboo4bob3o
3b5o10bobobobo$84b8o4b5o5bo4bobobo3boobo33bo3bo$86b5obo5bo8bo5bo5boo
15b5o15booboo$86b3oboo15bo12boo14b5o14b7o$135b7o15b3o$134b9o$138bo5$
75boo$75boo$73bob3obboo34bo3bo$71boobb6obo14bo3boo$70bob10o4boob4o6b6o
12b3o$69bob11obb7obobb10o13bo$69b26ob8o12b5o$69bob11obb7obobb10o13bo$
70bob10o4boob4o6b6o11b5o$71boobb6obo14bo3boo13b5o$73bob3obboo35b3o$75b
oo40bobo$75boo41bo$$65b4oboo$63b3ob4obo5bobo12b3o5bo16bo$62bob8o4b3obo
b3o8b3obo4boo13b3o$61bob9obb11o8b6obo15bobobo$61b19obobb4o4b7ob4o11bo
5bo$61bob9obb11o8b6obo17bo$62bob8o4b3obob3o8b3obo4boo$63b3ob4obo5bobo
12b3o5bo$65b4oboo4$56b3oboo35b3o$56b5obo5bo12boo14b3o$54b8o4b5o5boob6o
13bo$53bob7obb7obob11o$53b19ob11o$53bob7obb7obob11o$54b8o4b5o5boob6o
13bo$56b5obo5bo12boo14b3o$56b3oboo35b3o3$97b3o$96bobobo$96b5o$96b5o$
97b3o$45b4o47b5o$44b4obboo23bo20bobobo$42b9obo8bo11bobbo19bo3bo$41bob
9o4boob4o11b5o$40bob10obb10obo7b5o3bo16bo$40b21oboobbo5b8o18bo$40bob
10obb10obo7b5o3bo15b3o$41bob9o4boob4o11b5o$42b9obo8bo11bobbo$44b4obboo
23bo$45b4o4$35boo$35boo$33bob3obboo34bo3bo$31boobb6obo14bo3boo$30bob
10o4boob4o6b6o12b3o$29bob11obb7obobb10o13bo$29b26ob8o12b5o$29bob11obb
7obobb10o13bo$30bob10o4boob4o6b6o11b5o$31boobb6obo14bo3boo12bob3obo$
33bob3obboo35b3o$35boo38booboboo$35boo$$25b4oboo$23b3ob4obo5bobo12b3o
5bo17bo$22bob8o4b3obob3o8b3obo4boo$21bob9obb11o8b6obo15boo$21b19obobb
4o4b7ob4o12bobbo$21bob9obb11o8b6obo15b4o$22bob8o4b3obob3o8b3obo4boo10b
7o$23b3ob4obo5bobo12b3o5bo13boobbo$25b4oboo43b3obo$76boboo$75booboo$
15bo59b3obbo$5bo9boo18b3o16boo22bo$3b4o4bob4o8boo8boo17b3o17bo3boo$bb
6o3bob3obo3boobobo7bob4o14boboo18bo15bo$b16obb5obbobb4obb5o15boo25bo9b
oo$27ob5ob5o14boobo23b4o4bob4o$b16obb5obbobb4obb5o13boo24b6o3bob3obo3b
3obo$bb6o3bob3obo3boobobo7bob4o15bo22b16obb4obboo$3b4o4bob4o8boo8boo
15b3obo20b25o$5bo9boo18b3o14boboboo19b25o$15bo35bo6bo19b16obb4obboo$
53bob3o21b6o3bob3obo3b3obo$53bo26b4o4bob4o$18bo63bo9boo$11bobobo4boo9b
o60bo$12b3ob5obo8bo9boo$8boobob9o4boobbobobbo4b5o7b3o20bo$7bob13obb8o
bbobobb6o7b3o18b3o$7b37o9boo19boo$7bob13obb8obbobobb6o8boo$8boobob9o4b
oobbobobbo4b5o8bo$12b3ob5obo8bo9boo$11bobobo4boo9bo$18bo$$39b4o$38b4o
bboo22b3o$36b9obo5boo19b3o$35bob9o4b5obo13b6o$34bob10obb7o14b6o$34b22o
11bob7o$34bob10obb7o14b6o$35bob9o4b5obo13b6o$36b9obo5boo19b3o$38b4obb
oo22b3o$39b4o$$18bo$11bobobo4boo9bo$12b3ob5obo8bo9boo$8boobob9o4boobbo
bobbo4b5o$7bob13obb8obbobobb6o9bobo$7b37o9bo3bo$7bob13obb8obbobobb6o8b
ob3o$8boobob9o4boobbobobbo4b5o7boo3bo$12b3ob5obo8bo9boo8boobbobo$11bob
obo4boo9bo19bo4boo$18bo31bob4o$51b3o!
A period 40 sideways rocket rake.
This is based on a convoy of three rockets which produce no exhaust,
but which produce some accessible period 40 smoke.  The smoke is
perturbed by a large series of rockets into the sideways rockets.
A p20 ship deletes an unwanted p16 oscillator which is also produced
by the perturbation.
David I. Bell, January 1999
