PROLOGUISING

go in is li lo no nu oi on op or os pi si so un up us

gig gin gip gnu goo gor gos gul gun igg ins ion lin lip lis log loo lop lug nil nip nog noo nor nos nus oil ono ons ops ors our pig pin pis piu poi pol poo pro psi pug pul pun pur pus rig rin rip rug run sin sip sir sol son sop sou sri sun sup uns upo ups urn urp

gigs gins gips girl girn giro glop glug gnus gogo gong goon goop goos gorp grig grin grip grog gulp guls guns iggs iglu inro ions iris iron ling lino lins lion lips liri lisp logo logs loin long loon loop loos lops lorn loup lour lugs lung nils nips nisi nogg nogs noil noir nolo nori nous nurl oils olio onos onus oops opus ours pigs pili ping pins pion pirn piso plug plus pois polo pols pong pons pool poon poor poos porn pour prig prog pros pugs puli puls pung puns puri purl purs rigs ring rins rips roil roup rugs ruin rung runs sign silo sing slip slog slop slug slur snip snog snug soil soli solo song soon sori sorn soul soup sour spin spun spur sung upon urns urps