floko flook floom floop flouh floum fluff flumm flump fluo- fmmul fofum follo fu-fu fullf fullo fulop fulup hhhhh hlokk ho-ho ho-oh hofuf hoful hohol hohum hokku hoklo hokum hollo holo- holou holul holum homo- homok hoopl hopko hopl- hoppo hopup houff huhuh hukok hullo humof humph huolu k-pop khoku kholm khoum khufu khull khulo klomp kloof klopp klump ko-ko kohlu kohmo kohol kokko kokou kokum kolff kolho kollo kollu kolol komku kompo koolu kopff koppl koufu koulo kpolo kuhmo kukko kukok kukup kullo kullu kulul kumlu kumpf kumpo kumuk kuplu l-pop lofou lohho lokum lollo lolol lookf looph loph- lopou lukho lukko lukok lukom lukou lulom lulul lupul m-flo m-lok mflop mlomp mmhmm mmmmm moffo mohol mokko mokpo mokuk mokum mollo mollu molok moluk momlu mookk mooll moolu mopup moulu mpofu mukho mukul mullo mumlu mummu mumok mumpf muppu o-hum offof ofpop oh-oh oh-ok ohfoo ohmmm okfol okoho okpho okuku ollup olomu olumu ompok omuku omulu omupo oompf oomph ooooh ooooo oploo opoho opoku oppol oppum opump oukup oullo phlpp phofo phool plomp plook ploop plopp plopu plouh plouk pluff plump plupp po-po pokou polko polku pollo pollu polom polop pompu pomum poopo popop poppo popup pouff poulp puhmu pull- pullu puppo u-pml u-pop ufofu uh-oh uh-uh uhhoh uhhuh uloop ululu umhum uphol upoff upolo upolu uuuuu