dddd ddie ddre dedd dede dedi deed deep deer deet deid deie deip deir deit depe depp depr dept der- dere deri derp derr dete detr dide didi died diep dier diet diii dipe dipp dipt dird dire dirr dirt dite diti ditt dpdt dper dpie dred dree drei dret drie drip drit dtdp dted dttp edde eddi eddp ede- edei eder edie edip edit eede eeee eete eid- eide eidi eidr eied eiei eier eipr eird eire eiti eitr epee eper epi- epid epie epip epit eppp eprp epte erde erdi ered erei erer eret erie erit erpe erre etee eter etre ette etti ided idee ider idid idie idir idre idtp iedr ieet ieie iere ieri iett iide iied iiie iiii iiit iitr iitt ipdi iper ipet ipid ipie ippr ipri irdp ired iree irer iri- irid irie irip irpe irre irri irte irti irtp itep iter itet itie itri pdpr ped- pede pedi peed peep peer peet peip peir peit pepd pepe pepi per- perd pere peri perp perr pert pete peti petr pett pide pied piep pier piet piip pipe pipi pipp pire piri pirr pite piti pitr pitt pper ppid ppie pppd pppp pptt pre- pred pree prep pret pri- prid prie prii prpd prrd prri prti prtp prtr pter ptpd ptrd rder redd rede redi redr reed reep reet reid reii reir reit repe repi repp repr rept rerd rere reri rert retd rete reti retr rett ridd ride ridi ried riep rier riet ripd ripe ripi ripp ripr ript rire riri rite riti ritt rpdp rpet rpii rptd rred rrrr rtdt rtee rtei rttp tdri tedd tede tedi teed teer teet teie teip teir tepe tepi tepp ter- tere teri terp terr tete teti tetr tett tidd tide tie- tied tiee tiei tiep tier tiet tiit tip- tipe tipi tipp tipt tird tire tiri tirr tite titi titp titt tped tper tpir tppd tppp tppr tpte tptp tptr tre- tred tree trei tret tri- trie trip trit trpe trpp trte trtr tter tttt