-er -up a-a a-b a-c aaa aab aac aae aan aao aap aar aau ab- aba abb abc abe abn abo abp abr abu ac- aca acb acc ace acn aco acp acr acu aea aeb aec aee aen aeo aep aer aeu an- ana anb anc ane ann ano anp anr anu aoa aob aoc aoe aon aoo aop aor aou ap- apa apb apc ape apn apo app apr apu ar- ara arb arc are arn aro arp arr aru au- aua aub auc aue aun auo aup aur b-p b-u baa bab bac bae ban bao bap bar bau bba bbb bbc bbe bbn bbo bbp bbr bbu bca bcb bcc bce bcn bco bcp bcr bcu be- bea beb bec bee ben beo bep ber beu bna bnb bnc bne bnn bno bnp bnr bnu boa bob boc boe bon boo bop bor bou bpa bpb bpc bpe bpn bpo bpp bpr bpu bra brb bre brn bro brp brr bru bua bub buc bue bun buo bup bur buu c-- caa cab cac cae can cao cap car cau cba cbb cbc cbe cbn cbo cbp cbr cbu cca ccb ccc cce ccn cco ccp ccr ccu ce- cea ceb cec cee cen ceo cep cer ceu cn- cna cnb cnc cne cnn cno cnp cnr cnu co- coa cob coc coe con coo cop cor cou cpa cpb cpc cpe cpn cpo cpp cpr cpu cra crb crc cre crn cro crp crr cru cua cub cuc cue cun cuo cup cur cuu eaa eab eac eae ean eao eap ear eau eba ebb ebc ebe ebn ebo ebp ebr ebu ec- eca ecb ecc ece ecn eco ecr ecu eea eeb eec eee een eeo eep eer en- ena enb enc ene enn eno enp enr enu eo- eoa eob eoc eoe eon eoo eop eor eou ep- epa epb epc epe epn epo epp epr epu era erb erc ere ern ero erp err eru eu- eua eub euc eue eun eup eur naa nab nac nae nan nao nap nar nau nba nbb nbc nbe nbn nbo nbp nbr nbu nca ncb ncc nce ncn nco ncp ncr ncu ne- nea neb nec nee nen neo nep ner neu nna nnb nnc nne nnn nno nnp nnu no- noa nob noc noe non noo nop nor nou npa npb npc npe npn npo npp npr npu nra nrb nrc nre nrn nro nrp nrr nru nua nub nuc nue nun nuo nup nur nuu oaa oab oac oae oan oao oap oar oau ob- oba obb obc obe obn obo obp obr obu oc- oca ocb occ ocn oco ocp ocr ocu oea oeb oec oee oen oeo oep oer on- ona onb onc one onn ono onp onr onu oo- ooa oob ooc oon ooo oop oor op- opa opb opc ope opn opo opp opr or- ora orb orc ore orn oro orp orr oru ou- oua ouc oue oun ouo oup our p-p paa pab pac pae pan pao pap par pau pba pbb pbc pbe pbn pbo pbp pbr pbu pca pcb pcc pce pcn pco pcp pcr pcu pea peb pec pee pen peo pep per peu pn- pna pnb pnc pne pnn pno pnp pnr pnu poa pob poc poe pon poo pop por pou ppa ppb ppc ppe ppn ppo ppp ppr ppu pra prb prc pre prn pro prp prr pru pua pub puc pue pun pup pur puu ra- raa rab rac rae ran rao rap rar rau rba rbb rbc rbe rbn rbo rbp rbr rbu rca rcb rcc rce rcn rco rcp rcr rcu re- rea reb rec ree ren reo rep rer reu rna rnb rnc rnn rno rnp rnr rnu roa rob roc roe ron roo rop ror rou rpa rpb rpc rpe rpn rpo rpp rpr rpu rra rrb rrc rrn rrp rrr rru rua rub ruc rue run ruo rup rur ruu ua- uaa uab uac uae uan uao uap uar uau uba ubb ubc ube ubn ubo ubp ubr ubu uca ucb ucc uce ucn uco ucp ucr ucu uea ueb uec uee uen uep uer un- una unb unc une unn uno unp unr unu uoa uob uoc uoe uon uoo uop uor up- upa upb upc upe upn upo upp upr upu ur- ura urb urc ure urn uro urp urr uru uua uuc uue uun uur uuu