-er -ic a-a a-b a-c a-i aaa aab aac aae aai aak aan aao aar aas aau ab- aba abb abc abe abi abk abn abo abr abs abu ac- aca acb acc ace aci ack acn aco acr acs acu aea aeb aec aee aei aek aen aeo aer aes aeu ai- aia aib aic aie aii aik ain aio air ais aiu aka akb akc ake aki akk akn ako akr aks aku an- ana anb anc ane ani ank ann ano anr ans anu aoa aob aoc aoe aoi aok aon aoo aor aos aou ar- ara arb arc are ari ark arn aro arr ars aru as- asa asb asc ase asi ask asn aso asr ass asu au- aua aub auc aue aui auk aun auo aur aus b-u baa bab bac bae bai bak ban bao bar bas bau bba bbb bbc bbe bbi bbk bbn bbo bbr bbs bbu bca bcb bcc bce bci bck bcn bco bcr bcs bcu be- bea beb bec bee bei bek ben beo ber bes beu bi- bia bib bic bie bii bik bin bio bir bis biu bka bkb bkc bke bkk bkn bko bkr bks bna bnb bnc bne bni bnk bnn bno bnr bns bnu boa bob boc boe boi bok bon boo bor bos bou bra brb bre bri brk brn bro brr brs bru bsa bsb bsc bse bsi bsk bsn bso bsr bss bsu bua bub buc bue bui buk bun buo bur bus buu c-- caa cab cac cae cai cak can cao car cas cau cba cbb cbc cbe cbi cbk cbn cbo cbr cbs cbu cca ccb ccc cce cci cck ccn cco ccr ccs ccu ce- cea ceb cec cee cei cek cen ceo cer ces ceu ci- cia cib cic cie cii cik cin cio cir cis ciu cka ckb ckc cki cko cks cn- cna cnb cnc cne cni cnn cno cnr cns cnu co- coa cob coc coe coi cok con coo cor cos cou cra crb crc cre cri crk crn cro crr crs cru csa csb csc cse csi csk csn cso csr css csu cua cub cuc cue cui cuk cun cuo cur cus cuu eaa eab eac eae eai eak ean eao ear eas eau eba ebb ebc ebe ebi ebk ebn ebo ebr ebs ebu ec- eca ecb ecc ece eci eck ecn eco ecr ecs ecu eea eeb eec eee eek een eeo eer ees eia eib eic eie eii eik ein eio eir eis eiu eka ekb ekc eke eki eko ekr eks eku en- ena enb enc ene eni enk enn eno enr ens enu eo- eoa eob eoc eoe eoi eok eon eoo eor eos eou era erb erc ere eri erk ern ero err ers eru es- esa esb esc ese esi esk 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 ibk ibn ibo ibr ibs ibu ica icb icc ice ici ick icn ico icr ics icu ie- iea iec iee iei iek ien ier ies iia iib iic iie iii iin iio iir iis iiu ika ikb ikc ike iki ikk iko ikr iks iku in- ina inb inc ine ini ink inn ino inr ins inu io- ioa iob ioc ioe ioi ion ioo ior ios iou ir- ira irb irc ire iri irk irn iro irr irs iru is- isa isb isc ise isi isk isn iso isr iss isu iu- iua iub iuc iue iui iur ius ka- kaa kab kac kae kai kak kan kao kar kas kau kba kbb kbc kbe kbi kbk kbn kbo kbr kbs kbu kca kcb kcc kce kci kck kcn kcr kcs kcu ke- kea keb kec kee kei kek ken keo ker kes kia kib kic kie kii kik kin kio kir kis kiu kkb kkc kke kki kkk kkn kkr kks kku kn- kna knc kne kni knk knn kno knr knu koa kob koc koe koi kok kon koo kor kos kou kra krc kri krk krn kro krr krs kru ksa ksb ksc kse ksi ksk ksn kso ksr kss ksu kub kuc kue kui kuk kun kur kus kuu n-i naa nab nac nae nai nak nan nao nar nas nau nba nbb nbc nbe nbi nbk nbn nbo nbr nbs nbu nca ncb ncc nce nci nck ncn nco ncr ncs ncu ne- nea neb nec nee nei nek nen neo ner nes neu nia nib nic nie nii nik nin nio nir nis niu nka nkc nke nki nkk nkn nko nkr nks nku nna nnb nnc nne nni nnk nnn nno nns nnu no- noa nob noc noe noi nok non noo nor nos nou nra nrb nrc nre nri nrk nrn nro nrr nrs nru nsa nsb nsc nse nsi nsk nsn nso nsr nss nsu nua nub nuc nue nui nuk nun nuo nur nus nuu o-i oaa oab oac oae oai oak oan oao oar oas oau ob- oba obb obc obe obi obk obn obo obr obs obu oc- oca ocb occ oci ock ocn oco ocr ocs ocu oea oeb oec oee oei oen oeo oer oes oia oib oic oie oii oik oin oio oir ois oiu oka okb okc oke oki okk oko okr oks oku on- ona onb onc one oni onk onn ono onr ons onu oo- ooa oob ooc ooi ook oon ooo oor oos or- ora orb orc ore ori ork orn oro orr ors oru os- osa osb osc ose osi osk osn oso osr oss osu ou- oua ouc oue oui ouk oun ouo our ous ra- raa rab rac rae rai rak ran rao rar ras rau rba rbb rbc rbe rbi rbk rbn rbo rbr rbs rbu rca rcb rcc rce rci rcn rco rcr rcs rcu