-er -up a-a a-b a-c aaa aab aac aae aak aan aap aar aau ab- aba abb abc abe abk abn abp abr abu ac- aca acb acc ace ack acn acp acr acu aea aeb aec aee aek aen aep aer aeu aka akb akc ake akk akn akp akr aku an- ana anb anc ane ank ann anp anr anu ap- apa apb apc ape apk apn app apr apu ar- ara arb arc are ark arn arp arr aru au- aua aub auc aue auk aun aup aur b-p b-u baa bab bac bae bak ban bap bar bau bba bbb bbc bbe bbk bbn bbp bbr bbu bca bcb bcc bce bck bcn bcp bcr bcu be- bea beb bec bee bek ben bep ber beu bka bkb bkc bke bkk bkn bkp bkr bna bnb bnc bne bnk bnn bnp bnr bnu bpa bpb bpc bpe bpn bpp bpr bpu bra brb bre brk brn brp brr bru bua bub buc bue buk bun bup bur buu c-- caa cab cac cae cak can cap car cau cba cbb cbc cbe cbk cbn cbp cbr cbu cca ccb ccc cce cck ccn ccp ccr ccu ce- cea ceb cec cee cek cen cep cer ceu cka ckb ckc cn- cna cnb cnc cne cnn cnp cnr cnu cpa cpb cpc cpe cpk cpn cpp cpr cpu cra crb crc cre crk crn crp crr cru cua cub cuc cue cuk cun cup cur cuu eaa eab eac eae eak ean eap ear eau eba ebb ebc ebe ebk ebn ebp ebr ebu ec- eca ecb ecc ece eck ecn ecr ecu eea eeb eec eee eek een eep eer eka ekb ekc eke ekp ekr eku en- ena enb enc ene enk enn enp enr enu ep- epa epb epc epe epn epp epr epu era erb erc ere erk ern erp err eru eu- eua eub euc eue eun eup eur ka- kaa kab kac kae kak kan kap kar kau kba kbb kbc kbe kbk kbn kbp kbr kbu kca kcb kcc kce kck kcn kcp kcr kcu ke- kea keb kec kee kek ken kep ker kkb kkc kke kkk kkn kkp kkr kku kn- kna knc kne knk knn knp knr knu kpa kpc kpe kpk kpn kpp kpr kpu kra krc krk krn krp krr kru kub kuc kue kuk kun kup kur kuu naa nab nac nae nak nan nap nar nau nba nbb nbc nbe nbk nbn nbp nbr nbu nca ncb ncc nce nck ncn ncp ncr ncu ne- nea neb nec nee nek nen nep ner neu nka nkc nke nkk nkn nkp nkr nku nna nnb nnc nne nnk nnn nnp nnu npa npb npc npe npn npp npr npu nra nrb nrc nre nrk nrn nrp nrr nru nua nub nuc nue nuk nun nup nur nuu p-p paa pab pac pae pak pan pap par pau pba pbb pbc pbe pbk pbn pbp pbr pbu pca pcb pcc pce pck pcn pcp pcr pcu pea peb pec pee pek pen pep per peu pka pkb pkc pke pkn pkp pkr pku pn- pna pnb pnc pne pnk pnn pnp pnr pnu ppa ppb ppc ppe ppk ppn ppp ppr ppu pra prb prc pre prk prn prp prr pru pua pub puc pue puk pun pup pur puu ra- raa rab rac rae rak ran rap rar rau rba rbb rbc rbe rbk rbn rbp rbr rbu rca rcb rcc rce rcn rcp rcr rcu re- rea reb rec ree rek ren rep rer reu rkb rkc rke rkk rkp rku rna rnb rnc rnn rnp rnr rnu rpa rpb rpc rpe rpk rpn rpp rpr rpu rra rrb rrc rrk rrn rrp rrr rru rua rub ruc rue ruk run rup rur ruu ua- uaa uab uac uae uak uan uap uar uau uba ubb ubc ube ubk ubn ubp ubr ubu uca ucb ucc uce uck ucn ucp ucr ucu uea ueb uec uee uen uep uer uka ukb ukc uke ukk ukn ukp ukr uku un- una unb unc une unk unn unp unr unu up- upa upb upc upe upk upn upp upr upu ur- ura urb urc ure urk urn urp urr uru uua uuc uue uun uur uuu