elt( 0,'Earth', 1) . elt( 0,'Mars', 1) . elt( 0,'Planet 9 of alpha-Centauri', 1) . elt( 1,'is used as the cue ball in a game of galactic bar-billiards', 2) . elt( 1,'falls toward the Sun', 2) . elt( 1,'falls toward a black hole', 2) . elt( 1,'is struck by a comet', 2) . elt( 1,'is invaded by nasty aliens', 2) . elt( 1,'is taken over by mutant diploid armour plated pterodactyls with ESP and silicon-based DNA', 2) . elt( 1,'is taken over by a time-travelling loony who returns to his youth and', 3) . elt( 3,'changes sex, meets himself, and has children who become', 7) . elt( 3,'kills himself (I said he was a loony)', end) . elt( 7,'yet more of this loony who', 3) . elt( 7,'the whole human race', end) . elt( 2,'and everyone dies', end) . elt( 2,'and almost everyone dies', end) . elt( 2,'and is visited by evil', 4) . elt( 2,'and is visited by good', 4) . elt( 4,aliens, 5) . elt( 4,robots, 5) . elt( 4,'mutant brewers yeast cells', 5) . elt( 5,who, 6) . elt( 5,who, 17) . elt( 6,'also die', end) . elt( 6,'save everyone', 9) . elt( 6,'rewind time to before the disaster', 11) . elt( 6,'copy the lot into a giant super-VAX 11780000000 and edit out the nasty bits', 16) . elt( 9,'and depart', end) . elt( 9,'and give the secret of', 10) . elt( 11,'but then', 12) . elt( 11,'', 9) . elt( 10,'free fusion power', 13) . elt( 10,'free beer', 13) . elt( 10,'Life, the Universe, and Everything', 42) . elt( 10,'Life, the Universe, and Everything', 13) . elt( 10,'eternal life', 13) . elt( 42,'42', 13) . elt( 13,'so everyone gets very bored and tries to forget this by', 15) . elt( 13,'so everyone gets very bored and tries to forget this by', 14) . elt( 13,'so all live happily ever after', end) . elt( 15,'becoming Gods; creating a new Universe wherein', 0) . elt( 14,drinking, end) . elt( 16,'but the system crashes', end) . elt( 16,'but they mis-type "aliens" and take out all the lions instead', end) . elt( 16,'but they run out of credits', end) . elt( 16,'but they run out of budget', end) . elt( 16,'but they run out of CPU time', end) . elt( 16,'but they run out of memory', end) . elt( 16,'but the editor is in Prolog and they know only Basic', end) . elt( 17,'are wiped out by', 18) . elt( 17,'wish only to serve everyone', 21) . elt( 17,'save it and enslave everyone', end) . elt( 17,and, 22) . elt( 17,'are converted by the village priest (who tells them of God) to', 26) . elt( 17,'steal its reserves of', 27) . elt( 18,mumps, 19) . elt( 18,'atom-test radiation', 19) . elt( 18,'the village idiot', 19) . elt( 18,'the beer', 19) . elt( 19,'which then kills off everyone else', end) . elt( 19,'which then turns everyone else into supermen', 20) . elt( 20,'', end) . elt( 20,'', 13) . elt( 21,'(fried)', end) . elt( 21,'(boiled in white sauce)', end) . elt( 21,'', end) . elt( 22,'are stopped by a logician', 23) . elt( 23,'who says "I am lying"', 24) . elt( 23,'who cant remember the Paradox of the Liar and gets killed', end) . elt( 24,'and so he must be telling a falsehood', 25) . elt( 25,'so he must be telling the truth', 24) . elt( 26,'good ones', 5) . elt( 27,water, 28) . elt( 27,iron, 28) . elt( 27,'asparagus soup', 28) . elt( 27,beer, 28) . elt( 28,'', end) . elt( 28,and, 22) .