-hou eeee eheh eheu eiei eiho eiou eipo epee eph- ephi epi- epie epip eppo eppp eppy euoi eyey eyio eype eyup h-ii heep hehe heho heie heih heou hepe hepi hepp hepu heue heui heye heyh hhhh hhip hiei hieu hihe hihi hiho hiie hiiu hipe hipo hipp hiyo hoei hoey hohe hoho hoie hoip hooe hoop hope hopi hopo hopp hopy houe houp hoye hoyi hppe hpue huey huhi huhu huie hupe hupp huye hyhe hyo- hyp- hype hyph hypo hypy ieie ieio ieoh ihep ihop ihuo iiie iiii iiio iioi iioo iiop ioee ioii ioio iooi iooo ipie ipoe ipoh ipop ippo ippy iuiu iupp o-eo oeye oeyo ohee ohey ohhi ohho ohio ohoh ohye ohyo oiii ooho oooh oooo opei opep ophi opie opii opio opo- oppi oppo oppy opye ouie ouii oupe ouph ouu- oyee oyeu oyou peep pehe peho peio peip peou pepe pepi pepo peyo phe- phey phi- phip phoh phoo piep piip pipe pipi pipo pipp pipy piye piyo poey poio pooh poop pop- pope popi popo popp popy poui poup pouy poyo pphi ppie ppih pppo pppp ppye pu-e pueo pueu puhi puiu puoy pupe pupi pupu pupy puy- puyi puyo pyep pyhu pyo- pype pypy u-ie uepi uhoh uhuh uhup uipi upie uppe uppp uppu uppy upup uuuu ye-u yeep yehe yehu yeie yeii yeoh yepe yepp yeue yeye yeyi yeyo yhou yipe yohe yoho yoop yopo yopy youe youi youp yoye yoyo yueh yuhi yuie yupi yuye yuyu yyyy