-hou -ous bbbb bbbs bbhs bhhs bhoi bhuu bibb bibi bibo bibs bihi bihs bihu biis bio- bioi bios biou bis- bish biso biss bisu bobb bobi bobo bobs bobu boho bohs bohu boi- boii bois boiu boob booh boos bosh bosi boso boss bosu bouh bous bshs bsos bubb bubi bubo bubs bubu buhi buho buhs buis buiu bush busi buss busu buus h-ii hbbs hbhs hbio hbos hbss hhhh hhhs hhus hibi hibu hihi hiho hiis hiiu hiob hisb hish hiss hobo hobs hoho hois hoos hosh hoss hshs hsob hubb hubi hubo hubs huhi huhs huhu huib huis huos hush husi huso huss huub huus ibis ibos ibss ibus ihis ihob ihss ihub ihuo iiii iiio iiis iioi iioo iios iisi iisu iobi ioii ioio iooi iooo ioos ioso iosu ious ishi ishs isis iso- isos issh issi isso isss issu isuh isus iuiu iuss obbo obhs obis oboi obos obss obuh obus ohhi ohho ohhs ohio ohis ohob ohoh ohos ohso ohss ohus oiii oios oisu oobi ooho oohs oooh oooo ooos oosi oous oshi osho oshs oshu osii osis osoi osoo osos ossb ossi osso ossu oubs ouii ouis ouu- s-ib s-ii s-os sbbs sbhs sbsi sbus shbs shhh shhs shib shih shii shio shis shiu shoo shos shou shub shui shus shuu sibi sibo sibs sibu sihi sihs sihu sios siou sish sisi siss sisu siui sius sobo sobs sobu sohh soho sohs sohu sois soos sosh sosi soso soss sous sshs ssis sssb sssh sssi ssss sub- subb subh subi subo subs suhb suhi suho suio suis suoh suos sus- susi suso suss susu suus ubbi ubbo ubii ubis ubos uhoh uhss uhuh usbs ushi usho ushs ushu usis usoi usos ussb usss ussu usui usus uusi uuuu