raba rabb rabi rabu rac- raca racc raci racu raia raic raii raim rain rair raiu rama ramb rami ramm ramu rana ranc rani rann rara rarb rari raua raub rauc raum raun rbbb rbbr rcac rcbc rccb rccc rcic rcnr riaa riab riai riam rian riau rib- riba ribu rica ricc riia riin rima rimi rimm rimu rina rinn riri rman rnai rnbr rnin rrmc rrna rrrr rrum rrun ruan ruba rubb rubi rubu ruca ruci ruin ruma rumb rumi rumm runa runc runi runn rura rurc ruri ruru ruun uabc uaca uair uamc uarc uaru uaua ubac ubar ubba ubbi ubic ubii ubir ubra ucai ucam ucan ucar ucbc ucca ucci ucin ucmc ucrc ucua uica uima uira uirr umaa umac umai uman umar umb- umba umbi umma umra umri unaa unac unai unam unan unar unau unca uncc unci uni- unia unic unii unin unir unma unmc unmr unna unni unra unum urac urai uran urau urba urbi urca urci uria urib uric urim urin uriu urma urmi urna urni urra urri urum urun urur uuni uuri uuuu