bbbb bbci bbeb bbrc bbrg bcbc bcbg bccc bcci bcec bcer bcie bebb bebe bebi beby beci beeb beeg beer beey begg begi beic beir berc bere berg beri berr bery beye beyg beyi bgye bibb bibe bibi bicc bice bicg bici bieb bier bigb bigc bige bigg birb bire birg biri birr biry brcb brce breb brec bree breg brei brer brey bric brie brig brrr bry- brye byce byer byge bygg byre cbbc cbcc cbce cbcr cbec cbee cber cbgb cbir cbre cbry ccbc cccb cccc ccci ccee ccgc ccic ccii ccir ccrc ccre ccrg ccri cec- cece ceci ceeb ceec cege cer- cerc cere ceri cery cgcc cgcg cger cibc cibe cibi cicc cici cicr ciee cier cigi ciii cirb circ cire ciri cirr crbc crcc crce crcr cre- creb crec cree creg crei crib cric crie crig cry- cryb cybb cybc cybi cyc- cycb cycc cyeg cygb cyre cyy- cyyc ebbc ebbr ebby ebcc eber ebic ecbc ecbe eccb eccc ecce ecci ecib ecig ecrc ecri ecrr eeby eeee eerc eerg eery egbe egcc egcg egcr egec egee eger eggb egge eggi eggy egir egre egri egry egyr eiec eiei eier eige eigg eire eiry erbb erbe ercc erce ereb erec erei erer erg- ergg ergi eric erie errc erre eryc erye eyeb eyec eyer eyey eyir eyre eyry eyyr gc-c gcbc gccc gcic gcii gcrg gebe gebi geby gece geer gege gegg geic geie geig geir gerb gere geri gery geyi gggg gibb gibe giby gicr gier gige gigg gigi gire girg giri girr giry grbr grcc grce greb grec gree greg grey grib gric grie grig grrr gry- grye gybe gyer gyge gyr- gyre gyri i-be i-by ibec ibeg ibge ibie ibrc ibri ibyi icbc iccb iccc icci iccr icec icee icer icey icgc icrc icre icrr icry iecc ieie iere ieri igbc igcc iger iggy igri iiie iiii iirc irbe irby ircc ircg iree irer iri- iric irie irig iriy irrc irre irri iyer iyre rbbb rbbr rcbc rccb rccc rcgc rcic rcrg rcyc rebb rebe recc rece reci recr recy reeb rege regi regr reii reir rere rerg reri rery reye rgbe rgbi rib- ribe riby ricc rice rier rige rigg rigi rigy rire riri rrrr rybe ryeb ryge yber ybry yccc ycee ycie yeer yegg yegi yeie yeii yeir yerb yere yeri yerr yery yeye yeyi yeyr yirb yire yirr yyyy