bbbb bbci bbeb bbrc bbrg bcbc bcbg bccc bcci bcec bcer bcie bebb bebe bebi beci beeb beeg beer begg begi beic beir berc bere berg beri berr bibb bibe bibi bicc bice bicg bici bieb bier bigb bigc bige bigg birb bire birg biri birr brcb brce breb brec bree breg brei brer bric brie brig brrr cbbc cbcc cbce cbcr cbec cbee cber cbgb cbir cbre ccbc cccb cccc ccci ccee ccgc ccic ccii ccir ccrc ccre ccrg ccri cec- cece ceci ceeb ceec cege cer- cerc cere ceri 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 ebbc ebbr ebcc eber ebic ecbc ecbe eccb eccc ecce ecci ecib ecig ecrc ecri ecrr eeee eerc eerg egbe egcc egcg egcr egec egee eger eggb egge eggi egir egre egri eiec eiei eier eige eigg eire erbb erbe ercc erce ereb erec erei erer erg- ergg ergi eric erie errc erre gc-c gcbc gccc gcic gcii gcrg gebe gebi gece geer gege gegg geic geie geig geir gerb gere geri gggg gibb gibe gicr gier gige gigg gigi gire girg giri girr grbr grcc grce greb grec gree greg grib gric grie grig grrr i-be ibec ibeg ibge ibie ibrc ibri icbc iccb iccc icci iccr icec icee icer icgc icrc icre icrr iecc ieie iere ieri igbc igcc iger igri iiie iiii iirc irbe ircc ircg iree irer iri- iric irie irig irrc irre irri rbbb rbbr rcbc rccb rccc rcgc rcic rcrg rebb rebe recc rece reci recr reeb rege regi regr reii reir rere rerg reri rgbe rgbi rib- ribe ricc rice rier rige rigg rigi rire riri rrrr