-ic a-a a-b a-c a-i aaa aab aac aaf aag aai aao aar aas aau ab- aba abb abc abf abg abi abo abr abs abu ac- aca acb acc acf acg aci aco acr acs acu af- afa afb afc aff afg afi afo afr afs afu ag- aga agb agc agf agg agi ago agr ags agu ai- aia aib aic aif aig aii aio air ais aiu aoa aob aoc aof aog aoi aoo aor aos aou ar- ara arb arc arf arg ari aro arr ars aru as- asa asb asc asf asg asi aso asr ass asu au- aua aub auc auf aug aui auo aur aus b-u baa bab bac baf bag bai bao bar bas bau bba bbb bbc bbf bbg bbi bbo bbr bbs bbu bca bcb bcc bcf bcg bci bco bcr bcs bcu bfa bfb bfc bff bfg bfi bfo bfr bfs bfu bga bgb bgc bgf bgg bgi bgo bgr bgs bgu bi- bia bib bic bif big bii bio bir bis biu boa bob boc bof bog boi boo bor bos bou bra brb brf brg bri bro brr brs bru bsa bsb bsc bsf bsg bsi bso bsr bss bsu bua bub buc buf bug bui buo bur bus buu c-- caa cab cac caf cag cai cao car cas cau cba cbb cbc cbf cbg cbi cbo cbr cbs cbu cca ccb ccc ccf ccg cci cco ccr ccs ccu cfa cfb cfc cff cfg cfi cfo cfr cfs cfu cga cgb cgc cgg cgi cgo cgr cgs cgu ci- cia cib cic cif cig cii cio cir cis ciu co- coa cob coc cof cog coi coo cor cos cou cra crb crc crf crg cri cro crr crs cru csa csb csc csf csg csi cso csr css csu cua cub cuc cuf cug cui cuo cur cus cuu faa fab fac faf fag fai fao far fas fau fba fbb fbc fbf fbg fbi fbo fbr fbs fbu fca fcb fcc fcf fcg fci fco fcr fcs fcu ffa ffc fff ffg ffi ffo ffr ffs ffu fga fgb fgc fgf fgg fgi fgr fgs fia fib fic fif fig fii fir fis fiu foa fob foc fof fog foi foo for fos fou fra frb frc frf frg fri fro frr frs fru fsa fsb fsc fsf fsg fsi fso fsr fss fsu fua fub fuf fug fui fuo fur fus fuu gaa gab gac gaf gag gai gao gar gas gau gba gbc gbf gbg gbi gbo gbr gbs gbu gca gcb gcc gcf gcg gci gco gcr gcs gcu gfa gfb gfc gff gfi gfo gfr gfs gga ggb ggc ggg ggi ggo ggr ggs ggu gia gib gic gif gig gii gio gir gis giu goa gob goc gof gog goi goo gor gos gou gra grb grc grf grg gri gro grr grs gru gsa gsb gsc gsf gsg gsi gso gsr gss gsu gu- gua gub guc guf gug gui guo gur gus guu i-f ia- iaa iab iac iaf iag iai iao iar ias iau iba ibb ibc ibf ibg ibi ibo ibr ibs ibu ica icb icc icf icg ici ico icr ics icu ifa ifb ifc iff ifg ifi ifo ifr ifs ifu iga igb igc igf igg igi igo igr igs igu iia iib iic iif iii iio iir iis iiu io- ioa iob ioc iof iog ioi ioo ior ios iou ir- ira irb irc irf irg iri iro irr irs iru is- isa isb isc isf isg isi iso isr iss isu iu- iua iub iuc iug iui iur ius o-i oaa oab oac oaf oag oai oao oar oas oau ob- oba obb obc obf obg obi obo obr obs obu oc- oca ocb occ ocf ocg oci oco ocr ocs ocu of- ofa ofb ofc off ofg ofi ofo ofr ofs ofu oga ogc ogf ogg ogi ogo ogs oia oib oic oif oii oio oir ois oiu oo- ooa oob ooc oof oog ooi ooo oor oos or- ora orb orc orf org ori oro orr ors oru os- osa osb osc osf osg osi oso osr oss osu ou- oua ouc ouf oui ouo our ous ra- raa rab rac raf rag rai rao rar ras rau rba rbb rbc rbf rbg rbi rbo rbr rbs rbu rca rcb rcc rcf rcg rci rco rcr rcs rcu rfa rfb rfc rff rfg rfi rfo rfr rfs rfu rga rgb rgc rgf rgg rgi rgo rgr rgs ria rib ric rif rig rii rio rir ris roa rob roc rof rog roi roo ror ros rou rra rrb rrc rrf rrg rri rrr rrs rru rsa rsb rsc rsf rsg rsi rso rsr rss rsu rua rub ruc ruf rug rui ruo rur rus ruu saa sab sac saf sag sai sao sar sas sau sba sbb sbc sbf sbg sbi sbo sbr sbs sbu sca scb scc scf scg sci sco scr scs scu sfa sfb sfc sff sfg sfi sfo sfr sfs sfu sga sgb sgc sgf sgg sgi sgo sgr sgs sgu sia sib sic sif sig sii sio sir sis siu soa sob soc sof sog soi soo sor sos sou sr- sra srb src srf srg sri sro srr srs ss- ssa ssb ssc ssf ssg ssi sso ssr sss ssu sua sub suc suf sug sui suo sur sus suu ua- uaa uab uac uaf uag uai uao uar uas uau uba ubb ubc ubf ubg ubi ubo ubr ubs ubu uca ucb ucc ucf ucg uci uco ucr ucs ucu ufa ufc uff ufg ufi ufo ufr ufs ufu uga ugb ugc ugf ugg ugi ugo ugr ugs ugu uia uib uic uif uig uii uio uir uis uiu uoa uob uoc uog uoo uor uos ur- ura urb urc urf urg uri uro urr urs uru usa usb usc usf usg usi uso usr uss usu uua uuc uug uur