-er -ey a-a a-b a-c aaa aab aac aae aak aap aar aay ab- aba abb abc abe abk abp abr aby ac- aca acb acc ace ack acp acr acy aea aeb aec aee aek aep aer aey aka akb akc ake akk akp akr ap- apa apb apc ape apk app apr apy ar- ara arb arc are ark arp arr ary ay- aya ayc aye ayk ayp ayr b-p baa bab bac bae bak bap bar bay bba bbb bbc bbe bbk bbp bbr bby bca bcb bcc bce bck bcp bcr bcy be- bea beb bec bee bek bep ber bey bka bkb bkc bke bkk bkp bkr bpa bpb bpc bpe bpp bpr bpy bra brb bre brk brp brr bry by- bya byc bye byk byp byr c-- caa cab cac cae cak cap car cay cba cbb cbc cbe cbk cbp cbr cby cca ccb ccc cce cck ccp ccr ce- cea ceb cec cee cek cep cer cey cka ckb ckc cky cpa cpb cpc cpe cpk cpp cpr cra crb crc cre crk crp crr cry cya cyb cyc cye cyk cyp cyr eaa eab eac eae eak eap ear eba ebb ebc ebe ebk ebp ebr eby ec- eca ecb ecc ece eck ecr eea eeb eec eee eek eep eer eey eka ekb ekc eke ekp ekr eky ep- epa epb epc epe epp epr era erb erc ere erk erp err ery eya eyc eye eyp eyr ka- kaa kab kac kae kak kap kar kay kba kbb kbc kbe kbk kbp kbr kca kcb kcc kce kck kcp kcr ke- kea keb kec kee kek kep ker key kkb kkc kke kkk kkp kkr kky kpa kpc kpe kpk kpp kpr kra krc krk krp krr kry kya kyc kye kyp kyr p-p paa pab pac pae pak pap par pay pba pbb pbc pbe pbk pbp pbr pby pca pcb pcc pce pck pcp pcr pea peb pec pee pek pep per pey pka pkb pkc pke pkp pkr pky ppa ppb ppc ppe ppk ppp ppr pra prb prc pre prk prp prr pry py- pya pyb pyc pye pyk pyr ra- raa rab rac rae rak rap rar ray rba rbb rbc rbe rbk rbp rbr rca rcb rcc rce rcp rcr re- rea reb rec ree rek rep rer rey rkb rkc rke rkk rkp rky rpa rpb rpc rpe rpk rpp rpr rra rrb rrc rrk rrp rrr ry- rya ryc rye ryk ryr ryy yaa yab yac yae yak yap yar yay ybc ybe ybp ybr yby yca ycc yce ycp ycy yea yeb yec yee yek yep yer yey yka ykk ypa yra yrc yre yrp yyb yyc yye yyy