b-unit bbbbbb bibiri bibiru bimini binbit biribi birini birtin bitium bitrum bittur bituin biturn bribir bribri brimir brubru brunii brutii brutti brutum bububu bummit bunium burbur buriti burnin burnum burnut burtin bururi burutu butmir buttin buttir ibrium imirim inburn innuit intimi intrim intuit intumb inturn ittiri iturbi mibbit miburi minimi minimt minium minnit minnum mintiu minuit miriti miruru mitini mitrit mittin munnur muntin muriti muritu murium murmir murmur murrin murrit mutitu muttur muturi mutuum muumuu nibiru nibrin niburu nimbin nimbit nimrim nimrin nintin nitrum nittur ntuntu nubbin nummi- ribbin ribbit rimini rintin rirumu ritbum ritini rititi rubini rubrum rubutu rumbur rumint rumti- run-in runnin runnit runumi rurutu t-unit tibbin tibbit tibiri timimi timiri tinnum tintin tintri tirrit titbit titibu titini titiri tribit tribut triinu trinum trubin truitt tuiuti tumtum tuntum turbin turbit turini turmit turmut turnin turrum turtur tururu tuttut u-turn ubuntu uminum umirim unbitt unburn unimin unnitt untint untrim untrum unturn urturn utrubi uttini