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There are 104 twenty-letter words containing O, P, R and X

AIDS-related␣complexesAlexander␣polynomialsAlexandrov␣topologiesalkylhydroperoxidaseaminoexotripeptidaseaminopolycarboxylatebaritone␣saxophonistsblue␣bottle␣experimentboyfriend␣experiencescamphocarboxylic␣acidcarboxamidopeptidasecardiopericardiopexyciphertext-only␣attackcompact␣executive␣carscontrabass␣saxophonescontrolled␣explosionscoordinated␣complexescounterexpectationalcryptoviral␣extortiondeoxyribopyrimidinesdihydroxynaphthalenedihydroxytryptaminesEnd-Permian␣Extinctionepoxyeicosatrienoidsexocarboxypeptidasesexopolygalacturonaseexploratory␣committeeexpression␣of␣interestextracytoplasmicallyextrapetiolar␣stipulefactorial␣experimentsfirst-chance␣exceptionfluorohydroxyapatitegrandfather␣paradoxeshepatonephrotoxicityhexachloropalladateshexachloroplatinateshexafluorisopropanolhexafluorophosphateshexafluoroplatinateshexafluoropropyleneshydroxyphenylacetatehydroxypropiophenonehydroxyprostaglandinhydroxyspheriodenonehydroxystaurosporinei␣before␣e,␣except␣after␣c I␣before␣E,␣except␣after␣Cimperial␣examinationsinferiority␣complexesKolmogorov␣complexitylearns␣from␣experiencelearnt␣from␣experiencematrix␣decompositionsmercaptocarboxylatesmicrolymphocytotoxicmolecular␣beam␣epitaxymonocarboxypeptidasemulti-word␣expressionsnuclear␣pore␣complexesoligopseudorotaxanesorthorhombic␣pyroxeneout-of-body␣experiencesparadoxical␣intentionperformance␣anxietiesperoxophosphoric␣acidphenylhydroxylaminesphosphorus␣oxynitridephotodecarboxylationphotodermatotoxicityphotomixotrophicallyPolish␣Orthodox␣Churchpolitical␣price␣fixingpolyhydroxyalkanoatepolyhydroxybutyratespreexisting␣condition pre-existing␣conditionprinciple␣of␣explosionprocarboxypeptidasesproducer␣price␣indexesproxigean␣spring␣tidesproxy␣representativespseudoapproximationsRademacher␣complexityradiculoplexopathiesreflexive␣possessivesRNA␣expression␣patternRNA␣expression␣profilesimplified␣expressionsnake-in-the-box␣problemsopranino␣saxophonistsoprillo␣saxophonistssphenomaxillary␣fossasulfamethoxypyrazinesuperextraordinarilysuperiority␣complexessynchronisation␣proxysynchronization␣proxyTaeniopteryx␣nebulosaWizard␣of␣Oz␣experimentxenotransplantationsxeroderma␣pigmentosumxeromammographicallyxeroradiographically

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