bbbb bbci bbrc bbrg bcbc bcbg bccc bcci bcru bcuc bibb bibi bicc bicg bici bigb bigc bigg bigu birb birg biri birr biru brcb bric brig brrr bruc brug bubb bubi bubu bucc buci bucu bugg bugi buic buir buiu bur- burb burg buri burr buru cbbc cbcc cbcr cbcu cbgb cbir ccbc cccb cccc ccci cccu ccgc ccic ccii ccir ccrc ccrg ccri ccuc cgcc cgcg cibc cibi cicc cici cicr cicu cigi cigu ciii cirb circ ciri cirr ciuc crbc crbu crcc crcr crib cric crig criu crub crug cub- cubb cubi cucc cuci cui- cuir curb curi curr gc-c gcbc gccc gcic gcii gcrg gggg gibb gicr gigg gigi girg giri girr giru giur grbr grcc grib gric grig grrr grub grug grui grur gubb gubi gubu guci gugb gugg gugi gugu guib gurb gurg guri gurr guru ibrc ibri icbc iccb iccc icci iccr iccu icgc icrc icrr icru icub igbc igcc igri iiii iirc iiuc ircc ircg ircu iri- iric irig irrc irri iucc iuiu rbbb rbbr rcbc rccb rccc rcgc rcic rcrg rgbi rib- ribu ricc rigg rigi rigu riri rrrr rubb rubi rubu ruci rugg rugi rurc ruri ruru ubbi ubic ubii ubir ucbc ucci ucrc ugcc ugcg ugri ugur uguu uirr urbi urci urgi urgu urib uric uriu urri urur uuri uuuu