TROPHOGENIC

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cep chi cig cog con coo cop cor cot ego eng eon erg ern eth gen get ghi gie gin gip git goo gor got hen hep her het hic hie hin hip hit hoe hog hon hop hot ice ich ion ire neg net nip nit nog noh noo nor not nth oho one ono ooh oot ope opt orc ore ort pec peg peh pen per pet phi pht pic pie pig pin pit poh poi poo pot pro rec reg rei rep ret rho rig rin rip roc roe rot teg ten the tho tic tie tin tip toe tog ton too top tor

cent cero chin chip chit chon chop cine cion cire cite coho coin coir cone coni coon coop coot cope core corn cote crit crop echo echt epic ergo etch etic gent gien girn giro girt gite goer gone goon goop gore gorp goth grin grip grit grot heir hent hern hero hint hire hoer hone hong hoop hoot hope horn icon inch inro into iron itch nice nigh nite noir nope nori note ogre once onto open otic pech pein pent peon peri pert phon phot pice pier pine ping pint pion pirn pith poco poet pone pong pooh poon poor pore porn port prig prog rein rent repo rice rich ring riot ripe rite root rope rote roti roto tech tern then thin thio thir thro tier tine ting tire tiro tone tong toon tope toph topi topo torc tore tori torn toro trig trio trip trog trop