bbb bbh bbk bbo bhb bhh bhk bho bhv bkb bkk bko bkv bob boh bok boo bov boz bvb bvh bvk bvo bvv bzh bzo bzz hbb hbh hbk hbo hbv hbz hhb hhh hhk hho hhv hhz hkb hkh hkk hko hob hoh hok hoo hov hv- hvb hvk hvo hvv hzo k-z kbb kbh kbk kbo kbz khh khk kho khv khz kkb kkh kkk kkv kob koh kok koo koz kvb kvh kvk kvo kvv kzo ob- obb obh obk obo obv ohh oho okb okk oko oo- oob ooh ook ooo oov ov- ovb ovh ovo ovv ozo ozz vbh vbk vbo vbv vbz vh- vhb vho vkb vob voh vok voo vov voz vvb vvo vvv vvz zbb zbv zho zo- zob zok zoo zzz