bbbb bbdd bbeb bbpr bd-r bdii bebb bebe bebi bede bedi beeb beed beep beer beir berd bere beri berr bibb bibe bibi bide bidi bidr bieb bied bier bipp birb bird bire biri birr bprd breb bred bree brei brep brer brid brie brrr dbpd dddd ddie ddre debe debi dedd dede dedi deeb deed deep deer deid deie deip deir depe depp depr der- derb dere deri derp derr dibb dibe dibp dide didi dieb died diep dier diii dipe dipp dird dire dirr dper dpie dred dree drei drib drie drip ebbr ebed eber ebid edde eddi eddp ede- edei eder edie edip eede eeee eid- eide eidi eidr eied eiei eier eipr eird eire epee eper epi- epid epie epip eppp eprb eprp erbb erbe erde erdi ereb ered erei erer erie erpe erre i-be ibed ibid ibie ibrd ibri idbe ided idee ider idid idie idir idre iedr ieie iere ieri iide iied iiie iiii ipdi iper ipid ipie ippr ipri irbe irbp irdp ired iree irer iri- irid irie irip irpe irre irri pbed pdpr ped- pede pedi peed peep peer peip peir pepd pepe pepi per- perd pere peri perp perr pibb pibi pide pied piep pier piip pipe pipi pipp pire piri pirr pper ppib ppid ppie pppd pppp pre- preb pred pree prep pri- prid prie prii prpd prrd prri rbbb rbbr rdbp rder rebb rebe redd rede redi redr reeb reed reep reid reii reir repe repi repp repr rerd rere reri rib- ribe ridd ride ridi ried riep rier ripd ripe ripi ripp ripr rire riri rpdp rpii rred rrrr