bbbb bbpr bibb bibi bipm bipp bipu birb biri birr biru bmir bmmi brim brrm brrr brum brup bubb bubi bubu buir buiu bum- bumb bump bur- burb buri burm burp burr buru ibbm ibim ibmp ibri iiii iipm iium imbi imir immi impi impr imri imrr imup ipmi ipmp ippr ipri ipur irbm irbp iri- irip irri iuiu iupp mbim miii mim- mimi mimp mipi mipr miri mirr miru miui mmii mmmm mmpi mmpr mmpu mmrp mpir mppp mpri mprp mrbb mrbm mubi muir mumm mump mumu muri murr muru pbmr pibb pibi piip pimi pimp pipi pipp piri pirr piru pium pmbr pmip pmmp pmmu pmpm ppib pppp pprm ppru ppur pri- prii prim prri prrm prum pruu pubu puir puiu pumi pump pupi pupu pur- purb puri purp purr puru rbbb rbbr rib- ribu rimi rimm rimu ripi ripp ripr riri rmrp rpii rrmp rrrr rrum rubb rubi rubp rubu rumb rumi rumm rump rupp ruri rurp ruru u-rp ubbi ubii ubir uipi uirr umb- umbi umri upim uppp uppu upri upup urbi urib urim uriu urmi urri urum urup urur uuri uuuu