h-i hhh hhi hhk hho hhs hih hii hik hio his hkh hki hkk hko hks hoh hoi hok hoo hos hsh hsi hsk hss ihh ihi ihk iho ihs iih iii iio iis iki ikk iko iks io- ioh ioi ioo ios is- ish isi isk iso iss khh khi khk kho khs kih kii kik kio kis kkh kki kkk kks koh koi kok koo kos ksh ksi ksk kso kss o-i ohh ohi oho ohs oii oik oio ois oki okk oko oks oo- ooh ooi ook ooo oos os- osh osi osk oso oss sh- shh shi shk sho shs sih sii sik sio sis sk- skh ski skk sko sks soh soi sok soo sos ss- ssh ssi ssk sso sss