-ic a-a a-b a-c a-i aaa aab aac aaf aai aan aao aar aas aau ab- aba abb abc abf abi abn abo abr abs abu ac- aca acb acc acf aci acn aco acr acs acu af- afa afb afc aff afi afn afo afr afs afu ai- aia aib aic aif aii ain aio air ais aiu an- ana anb anc anf ani ann ano anr ans anu aoa aob aoc aof aoi aon aoo aor aos aou ar- ara arb arc arf ari arn aro arr ars aru as- asa asb asc asf asi asn aso asr ass asu au- aua aub auc auf aui aun auo aur aus b-u baa bab bac baf bai ban bao bar bas bau bba bbb bbc bbf bbi bbn bbo bbr bbs bbu bca bcb bcc bcf bci bcn bco bcr bcs bcu bfa bfb bfc bff bfi bfn bfo bfr bfs bfu bi- bia bib bic bif bii bin bio bir bis biu bna bnb bnc bnf bni bnn bno bnr bns bnu boa bob boc bof boi bon boo bor bos bou bra brb brf bri brn bro brr brs bru bsa bsb bsc bsf bsi bsn bso bsr bss bsu bua bub buc buf bui bun buo bur bus buu c-- caa cab cac caf cai can cao car cas cau cba cbb cbc cbf cbi cbn cbo cbr cbs cbu cca ccb ccc ccf cci ccn cco ccr ccs ccu cfa cfb cfc cff cfi cfn cfo cfr cfs cfu ci- cia cib cic cif cii cin cio cir cis ciu cn- cna cnb cnc cnf cni cnn cno cnr cns cnu co- coa cob coc cof coi con coo cor cos cou cra crb crc crf cri crn cro crr crs cru csa csb csc csf csi csn cso csr css csu cua cub cuc cuf cui cun cuo cur cus cuu faa fab fac faf fai fan fao far fas fau fba fbb fbc fbf fbi fbn fbo fbr fbs fbu fca fcb fcc fcf fci fcn fco fcr fcs fcu ffa ffc fff ffi ffn ffo ffr ffs ffu fia fib fic fif fii fin fir fis fiu fna fnb fnc fnf fni fnn fnr fns fnu foa fob foc fof foi fon foo for fos fou fra frb frc frf fri frn fro frr frs fru fsa fsb fsc fsf fsi fsn fso fsr fss fsu fua fub fuf fui fun fuo fur fus fuu i-f ia- iaa iab iac iaf iai ian iao iar ias iau iba ibb ibc ibf ibi ibn ibo ibr ibs ibu ica icb icc icf ici icn ico icr ics icu ifa ifb ifc iff ifi ifn ifo ifr ifs ifu iia iib iic iif iii iin iio iir iis iiu in- ina inb inc inf ini inn ino inr ins inu io- ioa iob ioc iof ioi ion ioo ior ios iou ir- ira irb irc irf iri irn iro irr irs iru is- isa isb isc isf isi isn iso isr iss isu iu- iua iub iuc iui iur ius n-i naa nab nac naf nai nan nao nar nas nau nba nbb nbc nbf nbi nbn nbo nbr nbs nbu nca ncb ncc ncf nci ncn nco ncr ncs ncu nfa nfb nfc nff nfi nfn nfo nfr nfs nfu nia nib nic nif nii nin nio nir nis niu nna nnb nnc nnf nni nnn nno nns nnu no- noa nob noc nof noi non noo nor nos nou nra nrb nrc nrf nri nrn nro nrr nrs nru nsa nsb nsc nsf nsi nsn nso nsr nss nsu nua nub nuc nui nun nuo nur nus nuu o-i oaa oab oac oaf oai oan oao oar oas oau ob- oba obb obc obf obi obn obo obr obs obu oc- oca ocb occ ocf oci ocn oco ocr ocs ocu of- ofa ofb ofc off ofi ofn ofo ofr ofs ofu oia oib oic oif oii oin oio oir ois oiu on- ona onb onc onf oni onn ono onr ons onu oo- ooa oob ooc oof ooi oon ooo oor oos or- ora orb orc orf ori orn oro orr ors oru os- osa osb osc osf osi osn oso osr oss osu ou- oua ouc ouf oui oun ouo our ous ra- raa rab rac raf rai ran rao rar ras rau rba rbb rbc rbf rbi rbn rbo rbr rbs rbu rca rcb rcc rcf rci rcn rco rcr rcs rcu rfa rfb rfc rff rfi rfn rfo rfr rfs rfu ria rib ric rif rii rin rio rir ris rna rnb rnc rni rnn rno rnr rns rnu roa rob roc rof roi ron roo ror ros rou rra rrb rrc rrf rri rrn rrr rrs rru rsa rsb rsc rsf rsi rsn rso rsr rss rsu rua rub ruc ruf rui run ruo rur rus ruu saa sab sac saf sai san sao sar sas sau sba sbb sbc sbf sbi sbn sbo sbr sbs sbu sca scb scc scf sci scn sco scr scs scu sfa sfb sfc sff sfi sfn sfo sfr sfs sfu sia sib sic sif sii sin sio sir sis siu sna snb snc snf sni snn sno snr sns snu soa sob soc sof soi son soo sor sos sou sr- sra srb src srf sri srn sro srr srs ss- ssa ssb ssc ssf ssi ssn sso ssr sss ssu sua sub suc suf sui sun suo sur sus suu ua- uaa uab uac uaf uai uan uao uar uas uau uba ubb ubc ubf ubi ubn ubo ubr ubs ubu uca ucb ucc ucf uci ucn uco ucr ucs ucu ufa ufc uff ufi ufn ufo ufr ufs ufu uia uib uic uif uii uin uio uir uis uiu un- una unb unc unf uni unn uno unr uns unu uoa uob uoc uon uoo uor uos ur- ura urb urc urf uri urn uro urr urs uru