-er -ic a-a a-b a-c a-i aaa aab aac aae aai aan aao aar aas aau ab- aba abb abc abe abi abn abo abr abs abu ac- aca acb acc ace aci acn aco acr acs acu aea aeb aec aee aei aen aeo aer aes aeu ai- aia aib aic aie aii ain aio air ais aiu an- ana anb anc ane ani ann ano anr ans anu aoa aob aoc aoe aoi aon aoo aor aos aou ar- ara arb arc are ari arn aro arr ars aru as- asa asb asc ase asi asn aso asr ass asu au- aua aub auc aue aui aun auo aur aus b-u baa bab bac bae bai ban bao bar bas bau bba bbb bbc bbe bbi bbn bbo bbr bbs bbu bca bcb bcc bce bci bcn bco bcr bcs bcu be- bea beb bec bee bei ben beo ber bes beu bi- bia bib bic bie bii bin bio bir bis biu bna bnb bnc bne bni bnn bno bnr bns bnu boa bob boc boe boi bon boo bor bos bou bra brb bre bri brn bro brr brs bru bsa bsb bsc bse bsi bsn bso bsr bss bsu bua bub buc bue bui bun buo bur bus buu c-- caa cab cac cae cai can cao car cas cau cba cbb cbc cbe cbi cbn cbo cbr cbs cbu cca ccb ccc cce cci ccn cco ccr ccs ccu ce- cea ceb cec cee cei cen ceo cer ces ceu ci- cia cib cic cie cii cin cio cir cis ciu cn- cna cnb cnc cne cni cnn cno cnr cns cnu co- coa cob coc coe coi con coo cor cos cou cra crb crc cre cri crn cro crr crs cru csa csb csc cse csi csn cso csr css csu cua cub cuc cue cui cun cuo cur cus cuu eaa eab eac eae eai ean eao ear eas eau eba ebb ebc ebe ebi ebn ebo ebr ebs ebu ec- eca ecb ecc ece eci ecn eco ecr ecs ecu eea eeb eec eee een eeo eer ees eia eib eic eie eii ein eio eir eis eiu en- ena enb enc ene eni enn eno enr ens enu eo- eoa eob eoc eoe eoi eon eoo eor eos eou era erb erc ere eri ern ero err ers eru es- esa esb esc ese esi esn eso esr ess esu eu- eua eub euc eue eui eun eur eus ia- iaa iab iac iae iai ian iao iar ias iau iba ibb ibc ibe ibi ibn ibo ibr ibs ibu ica icb icc ice ici icn ico icr ics icu ie- iea iec iee iei ien ier ies iia iib iic iie iii iin iio iir iis iiu in- ina inb inc ine ini inn ino inr ins inu io- ioa iob ioc ioe ioi ion ioo ior ios iou ir- ira irb irc ire iri irn iro irr irs iru is- isa isb isc ise isi isn iso isr iss isu iu- iua iub iuc iue iui iur ius n-i naa nab nac nae nai nan nao nar nas nau nba nbb nbc nbe nbi nbn nbo nbr nbs nbu nca ncb ncc nce nci ncn nco ncr ncs ncu ne- nea neb nec nee nei nen neo ner nes neu nia nib nic nie nii nin nio nir nis niu nna nnb nnc nne nni nnn nno nns nnu no- noa nob noc noe noi non noo nor nos nou nra nrb nrc nre nri nrn nro nrr nrs nru nsa nsb nsc nse nsi nsn nso nsr nss nsu nua nub nuc nue nui nun nuo nur nus nuu o-i oaa oab oac oae oai oan oao oar oas oau ob- oba obb obc obe obi obn obo obr obs obu oc- oca ocb occ oci ocn oco ocr ocs ocu oea oeb oec oee oei oen oeo oer oes oia oib oic oie oii oin oio oir ois oiu on- ona onb onc one oni onn ono onr ons onu oo- ooa oob ooc ooi oon ooo oor oos or- ora orb orc ore ori orn oro orr ors oru os- osa osb osc ose osi osn oso osr oss osu ou- oua ouc oue oui oun ouo our ous ra- raa rab rac rae rai ran rao rar ras rau rba rbb rbc rbe rbi rbn rbo rbr rbs rbu rca rcb rcc rce rci rcn rco rcr rcs rcu re- rea reb rec ree rei ren reo rer res reu ria rib ric rie rii rin rio rir ris rna rnb rnc rni rnn rno rnr rns rnu roa rob roc roe roi ron roo ror ros rou rra rrb rrc rri rrn rrr rrs rru rsa rsb rsc rse rsi rsn rso rsr rss rsu rua rub ruc rue rui run ruo rur rus ruu saa sab sac sae sai san sao sar sas sau sba sbb sbc sbe sbi sbn sbo sbr sbs sbu sca scb scc sce sci scn sco scr scs scu se- sea seb sec see sei sen seo ser ses seu sia sib sic sie sii sin sio sir sis siu sna snb snc sne sni snn sno snr sns snu soa sob soc soe soi son soo sor sos sou sr- sra srb src sre sri srn sro srr srs ss- ssa ssb ssc sse ssi ssn sso ssr sss ssu sua sub suc sue sui sun suo sur sus suu ua- uaa uab uac uae uai uan uao uar uas uau uba ubb ubc ube ubi ubn ubo ubr ubs ubu uca ucb ucc uce uci ucn uco ucr ucs ucu uea ueb uec uee uei uen uer ues uia uib uic uie uii uin uio uir uis uiu un- una unb unc une uni unn uno unr uns unu uoa uob uoc uoe uon uoo uor uos ur- ura urb urc ure uri urn