-er a-a a-b a-c aaa aab aac aae aaf aah aan aao aar aas aau ab- aba abb abc abe abf abh abn abo abr abs abu ac- aca acb acc ace acf ach acn aco acr acs acu aea aeb aec aee aef aeh aen aeo aer aes aeu af- afa afb afc afe aff afh afn afo afr afs afu aha ahb ahc ahe ahf ahh ahn aho ahr ahs ahu an- ana anb anc ane anf anh ann ano anr ans anu aoa aob aoc aoe aof aoh aon aoo aor aos aou ar- ara arb arc are arf arh arn aro arr ars aru as- asa asb asc ase asf ash asn aso asr ass asu au- aua aub auc aue auf auh aun auo aur aus b-u baa bab bac bae baf bah ban bao bar bas bau bba bbb bbc bbe bbf bbh bbn bbo bbr bbs bbu bca bcb bcc bce bcf bch bcn bco bcr bcs bcu be- bea beb bec bee bef beh ben beo ber bes beu bfa bfb bfc bfe bff bfh bfn bfo bfr bfs bfu bha bhb bhc bhe bhf bhh bho bhr bhs bhu bna bnb bnc bne bnf bnn bno bnr bns bnu boa bob boc boe bof boh bon boo bor bos bou bra brb bre brf brh brn bro brr brs bru bsa bsb bsc bse bsf bsh bsn bso bsr bss bsu bua bub buc bue buf buh bun buo bur bus buu c-- caa cab cac cae caf cah can cao car cas cau cba cbb cbc cbe cbf cbh cbn cbo cbr cbs cbu cca ccb ccc cce ccf cch ccn cco ccr ccs ccu ce- cea ceb cec cee cef ceh cen ceo cer ces ceu cfa cfb cfc cfe cff cfh cfn cfo cfr cfs cfu ch- cha chb chc che chf chh chn cho chr chs chu cn- cna cnb cnc cne cnf cnh cnn cno cnr cns cnu co- coa cob coc coe cof coh con coo cor cos cou cra crb crc cre crf crh crn cro crr crs cru csa csb csc cse csf csh csn cso csr css csu cua cub cuc cue cuf cuh cun cuo cur cus cuu eaa eab eac eae eaf eah ean eao ear eas eau eba ebb ebc ebe ebf ebh ebn ebo ebr ebs ebu ec- eca ecb ecc ece ecf ech ecn eco ecr ecs ecu eea eeb eec eee eef een eeo eer ees ef- efa efb efc efe eff efh efo efr efs eha ehb ehc ehe ehf ehh ehn eho ehr ehs ehu en- ena enb enc ene enf enh enn eno enr ens enu eo- eoa eob eoc eoe eof eoh eon eoo eor eos eou era erb erc ere erf erh ern ero err ers eru es- esa esb esc ese esf esh esn eso esr ess esu eu- eua eub euc eue euf eun eur eus faa fab fac fae faf fah fan fao far fas fau fba fbb fbc fbe fbf fbh fbn fbo fbr fbs fbu fca fcb fcc fce fcf fcn fco fcr fcs fcu fea feb fec fee fef feh fen feo fer fes feu ffa ffc ffe fff ffh ffn ffo ffr ffs ffu fha fhb fhc fhe fhf fhh fhn fho fhr fhs fna fnb fnc fne fnf fnh fnn fnr fns fnu foa fob foc foe fof foh fon foo for fos fou fra frb frc fre frf frh frn fro frr frs fru fsa fsb fsc fse fsf fsh fsn fso fsr fss fsu fua fub fue fuf fun fuo fur fus fuu haa hab hac hae haf hah han hao har has hau hba hbb hbc hbe hbf hbh hbn hbo hbr hbs hbu hca hcb hcc hce hcf hch hcn hco hcr hcs he- hea heb hec hee hef heh hen heo her hes heu hfa hfb hfc hfe hff hfh hfn hfo hfr hfs hfu hha hhb hhc hhe hhf hhh hhn hho hhr hhs hhu hna hnb hnc hne hnf hnh hnn hno hns hnu hoa hob hoc hoe hof hoh hon hoo hor hos hou hr- hra hrb hrc hre hrf hrh hrn hro hrr hrs hru hsa hsb hsc hse hsf hsh hsn hsr hss hsu hua hub huc hue huf huh hun huo hur hus huu naa nab nac nae naf nah nan nao nar nas nau nba nbb nbc nbe nbf nbn nbo nbr nbs nbu nca ncb ncc nce ncf nch ncn nco ncr ncs ncu ne- nea neb nec nee nef neh nen neo ner nes neu nfa nfb nfc nfe nff nfn nfo nfr nfs nfu nha nhb nhc nhe nhf nhh nhn nhr nhs nhu nna nnb nnc nne nnf nnh nnn nno nns nnu no- noa nob noc noe nof noh non noo nor nos nou nra nrb nrc nre nrf nrn nro nrr nrs nru nsa nsb nsc nse nsf nsh nsn nso nsr nss nsu nua nub nuc nue nuh nun nuo nur nus nuu oaa oab oac oae oaf oah oan oao oar oas oau ob- oba obb obc obe obf obh obn obo obr obs obu oc- oca ocb occ ocf och ocn oco ocr ocs ocu oea oeb oec oee oef oeh oen oeo oer oes of- ofa ofb ofc ofe off ofn ofo ofr ofs ofu oha ohc ohe ohf ohh ohn oho ohr ohs ohu on- ona onb onc one onf onh onn ono onr ons onu oo- ooa oob ooc oof ooh oon ooo oor oos or- ora orb orc ore orf orh orn oro orr ors oru os- osa osb osc ose osf osh osn oso osr oss osu ou- oua ouc oue ouf ouh oun ouo our ous ra- raa rab rac rae raf rah ran rao rar ras rau rba rbb rbc rbe rbf rbh rbn rbo rbr rbs rbu rca rcb rcc rce rcf rch rcn