Pull all the plugs. Then put your foot to the floor and crank the engine over a good 10 seconds a couple of times to clear the cylinders.
Once you do that..toss in a fresh set of plugs and try to fire it up. Expect it to sputter because you probably can't get all the fuel out of all the cylinders. Keep it running and get it to rev a little..that will clear it out. Should be back in business after that.
I've actually done that second part on cars that drank too much coolant with an UIM failure. 3 cylinders is all you need to get it going