h-ii hhhh hihi hiho hiht hiit hiri hiro hirt hiti hito hitt hoho hoir hoit hoor hoot hori horo horr hort hoth hoti hoto hotr hott hrit htoh httr ihit iiht iiii iiio iiit iioi iioo iitr iitt ioii ioio ioit iooi iooo iori ioto iri- irio iroh irri irti itoh itoi itoo itor itri itto ohhi ohho ohio ohoh ohto oiii oirt oiti ooho oooh oooo oort ori- orio orit oro- oror orot orri orro orth orto otho othr otit oto- otoh otoo otor otro otti otto rhio rhoh riho riht riot riri rith riti rito ritt rohr roio roir roit rooi roor root rori roro rort roth roti roto rotr rott rrrr thi- thio thir thoo thor thot thri thro thtr tiht tiit tiri tiro tirr tith titi tito titt tohi toho toit tooh toor toot tori toro torr tort toth toti toto totr tott tri- trio trit troi troo trot trtr tttt