b-r-k bbook bfrog bibbo bibio bibri biffi biffo bifor big-i bigif bigig bigoo bikok bioko birgi bo-bo bobbi bobik bobko bobok bobr bobri boffi boffo bogof bogor boiro bokko bokok bokor booki booko borbo borgo borik borio borko boro- borok boroo borro brigg brigi brobo brook brrrr fibr- fibro fikri fiori firgo fogbo foggo foir- forgo forio forro frigg frigo friog gboko ggobi gi-fi gibbi gibi- gikii gikor girik go-go go-oo gobbi gobbo gobig gobio gobir goffi gofio gofor gogoi gogok gogro goibo goobi goobo gooff gooik gorgo gorir gorki griff grifo grigg groff grogg grokk groof grook grrrr ibibo ibogo ibook ibrik if-- iggri igigi igrok iiiii ikbkg ikobo ikoro ioooi ioooo iorio iriki irobo iroko irori k-rob kibbi kibbo kibi- kibor kifri kigio kiiki kikki kikko kikoi kioko kirfi kirgi kirki ko-ko kobri kogri kogro koigi koiri kokir kokki kokko kokoi kokor koogi kooki koori korbo korff korfi korgi korki koror korri korro kribi o-r-b oboro obrok offir offof ofori oggif ogiri ogogo oiko- okobo okoki okoro okrog ooioo ooooo orfor oribi origi origo orobo orrgo ri-fi ribbi ribo- rig-i rigio rigor rikki ro-ro robbi robbo robik robo- robor rofor rogoi rokki rokkk rorik