x = 150, y = 49
39b3oboobobb3o46b3obboboob3o$35boboo4booboo4bo6bo30bo6bo4booboo4boobo$
34b3o3bobbobo6bobobboobobo24boboboobbobo6bobobbo3b3o$33bo3bo3bo5boobo
3boo4bobbo22bobbo4boo3boboo5bo3bo3bo$34bo16boboboo3bobboobboo12boobboo
bbo3boobobo16bo$59bobbooboboo12booboboobbo$59boo4bo3bo10bo3bo4boo$29b
3obo11b3o10boobbobbobobo10bobobobbobboo10b3o11bob3o$20boo6bo5bo6bo6bo
11bo28bo11bo6bo6bo5bo6boo$5boboob3o5booboboo3boobobboo4b4o4b5o13b3o12b
3o13b5o4b4o4boobboboo3booboboo5b3oboobo$4booboo4boobo4bobb5ob4obboobo
3boo3boboobo42boboobo3boo3boboobb4ob5obbo4boboo4booboo$3bobbobobbo3boo
6bo3bo8b4obo4bobobobbo42bobbobobo4bob4o8bo3bo6boo3bobbobobbo$4bo5bo3bo
3bo7bo14bo3bo4booboo13boo10boo13booboo4bo3bo14bo7bo3bo3bo5bo$35bo4bo
10bobo14boobooboobooboo14bobo10bo4bo$36bo11boo3boboo12boboobooboobo12b
oobo3boo11bo$53boboob3o9boo6boo9b3oboobo$7boo19bo5bo19bobo4boo10bobbo
10boo4bobo19bo5bo19boo$5b3obo10bo6boo5b3o3boboobo13bobo8bo8bo8bobo13bo
boobo3b3o5boo6bo10bob3o$booboo3boobo3bo3boo4bobo5bobbooboobobboobo7bo
3b3o7bobboobbo7b3o3bo7boboobbobooboobbo5bobo4boo3bo3boboo3booboo$boobb
obbob3obooboobb4obobboboobboo4b3obbooboo7boboobob3o5bobbo5b3oboboobo7b
ooboobb3o4boobboobobbob4obbooboob3obobbobboo$obbo7bo5bobbobboob4obbobo
b3obbobboobo3bobb4o8boo4boobboo4boo8b4obbo3boboobbobb3obobobb4oboobbo
bbo5bo7bobbo$12bo3bobo9boobbo3bo5bob3obo8bob3obobboo4boobboo4boobbob3o
bo8bob3obo5bo3bobboo9bobo3bo$51bo5bobooboob4oboo6boob4obooboobo5bo$32b
ooboo5boobobbobboob5o4bobo4boboboobobo4bobo4b5oboobbobboboo5booboo$46b
o7bobo5boobo4bobo4bobo4boboo5bobo7bo$14bo7b4o40boboobobobboboboobo40b
4o7bo$7boob3ob3o5boboboo38b3o12b3o38boobobo5b3ob3oboo$7boo4bobbooboobb
o4bo9booboob3obo17boobbo3boo3bobboo17bob3obooboo9bo4bobbooboobbo4boo$
6bobboboo3bobboo6b3o4b3obooboo4boboboo15boobb6obboo15boobobo4booboob3o
4b3o6boobbo3boobobbo$18bo10boobbo7bo3bo5boo4bo3booboo3bobo6bobo3booboo
3bo4boo5bo3bo7bobboo10bo$30bobboboo6bo7boo3boboboboboo18boobobobobo3b
oo7bo6boobobbo$29boobboo10booboo5bo4bobobo5boo6boo5bobobo4bo5booboo10b
oobboo$14bo6boo10boo9bo3boo3b4obo32bob4o3boo3bo9boo10boo6bo$12b3ob3ob
oo31boo17b6o17boo31boob3ob3o$11boo6b3oboo100boob3o6boo$6bo3bobbo3boobb
oboobo3boo34boo14boo34boo3boboobobboo3bobbo3bo$5b4o13bo4b4obo3b3o10boo
10bobooboo14booboobo10boo10b3o3bob4o4bo13b4o$4bo3bo14bo3boo3boo3boboo
3b3oboboo8booboo3bobbo6bobbo3booboo8boobob3o3boobo3boo3boo3bo14bo3bo$
5bobobbo20bob3obo3bobobooboboobb4o6bo4boobbobbobboo4bo6b4obbooboboobob
o3bob3obo20bobbobo$9bo23boo3boobob5obob3obobo3bo8bo8bo8bo3bobob3obob5o
boboo3boo23bo$22b4o7bo3boboobo7bo4bobo3bo8boo6boo8bo3bobo4bo7boboobo3b
o7b4o$8bo11b3oboo7booboobob4obo4bobbobobbobo10boboobo10bobobbobobbo4bo
b4obobooboo7boob3o11bo$6b4o9boo4bobboboo3b4obo5b4obobb4obb3o11boo11b3o
bb4obbob4o5bob4o3boobobbo4boo9b4o$bbooboo3bo3bo3bo3b3ob3obbobb4o6b4obo
boo4bobboo12boo12boobbo4boobob4o6b4obbobb3ob3o3bo3bo3bo3booboo$bboobbo
5b4obbobo9bo5bo8bobbo3bo3boo34boo3bo3bobbo8bo5bo9bobobb4o5bobboo$bobbo
7bo3bobobb3oboboo11booboo4boboo17bo8bo17boobo4booboo11boobob3obbobo3bo
7bobbo$10bobbobobb4o14bobo9bo20b3o6b3o20bo9bobo14b4obbobobbo$11bo6bobo
47bo3bo4bo3bo47bobo6bo$68booboo4booboo!
A period 36 c/3 spaceship.
This consists of a puffer engine whose exhaust is completely eliminated
by the two period 3 c/3 spaceships at the back.  If the back spaceships
are removed, the puffer engine will self destruct.  But other placements
of back spaceships can allow a working puffer.
David I. Bell, March 1998