bbbb bibb bibi bimx birb biri birr biru birx biry bixi bmir bmmi brim brix brrm brrr brum brux bry- bubb bubi bubu buir buiu buix bum- bumb bur- burb buri burm burr buru bury buxy buyi buyu i-by ibbm ibim ibmx ibri ibuy ibyi iiii iium imbi imir imix immi immy imri imrr irbm irby iri- irix iriy irri iuiu ixxi mbim miii mim- mimi mimy miri mirr miru miry miui mixi mixx mixy miyu mmii mmix mmmm mmxi mmxx mmyy mrbb mrbm mubi muir mumm mumu mumy muri murr muru mury muxi muxu muxy mxii mxim mxxi mybb mybi myi- myir mymy myrr myry myx- myxy rbbb rbbr rbmx rib- ribu riby rimi rimm rimu rimy riri rixy rrrr rrum rubb rubi rubu ruby rumb rumi rumm rumy ruri ruru ruyi ryim ubbi ubii ubir ubyx uimx uirr umb- umbi umri urbi urib urim uriu urix urmi urri urry urum urur uuri uuuu uyir xibu xiii xixi xiyu xmii xuri xuxu xxii xxix xxxi xxxx xxxy xyr- ybry yirb yirm yirr ymir ymur yubu yumi yuri yury yuxi yuxu yuyu yyyy