-ic a-a a-b a-c a-i aaa aab aac aad aai aak aar aas aau ab- aba abb abc abd abi abk abr abs abu ac- aca acb acc acd aci ack acr acs acu ad- ada adb adc add adi adk adr ads adu ai- aia aib aic aid aii aik air ais aiu aka akb akc akd aki akk akr aks aku ar- ara arb arc ard ari ark arr ars aru as- asa asb asc asd asi ask asr ass asu au- aua aub auc aud aui auk aur aus b-u baa bab bac bad bai bak bar bas bau bba bbb bbc bbd bbi bbk bbr bbs bbu bca bcb bcc bcd bci bck bcr bcs bcu bda bdb bdc bdd bdi bdk bdr bds bdu bi- bia bib bic bid bii bik bir bis biu bka bkb bkc bkk bkr bks bra brb brd bri brk brr brs bru bsa bsb bsc bsd bsi bsk bsr bss bsu bua bub buc bud bui buk bur bus buu c-- caa cab cac cad cai cak car cas cau cba cbb cbc cbd cbi cbk cbr cbs cbu cca ccb ccc ccd cci cck ccr ccs ccu cda cdb cdc cdd cdi cdk cdr cds cdu ci- cia cib cic cid cii cik cir cis ciu cka ckb ckc ckd cki cks cra crb crc crd cri crk crr crs cru csa csb csc csd csi csk csr css csu cua cub cuc cud cui cuk cur cus cuu daa dab dac dad dai dak dar das dau dba dbb dbc dbd dbi dbk dbr dbs dbu dca dcb dcc dcd dci dck dcr dcs dcu dda ddb ddc ddd ddi ddk ddr dds ddu di- dia dib dic did dii dik dir dis diu dka dkb dkc dki dkk dkr dks dku dra drb drc drd dri drk drr drs dru dsa dsb dsc dsd dsi dsk dsr dss dsu dua dub duc dud dui duk dur dus i-d ia- iaa iab iac iad iai iar ias iau iba ibb ibc ibd ibi ibk ibr ibs ibu ica icb icc icd ici ick icr ics icu ida idb idc idd idi idk idr ids idu iia iib iic iid iii iir iis iiu ika ikb ikc iki ikk ikr iks iku ir- ira irb irc ird iri irk irr irs iru is- isa isb isc isd isi isk isr iss isu iu- iua iub iuc iud iui iur ius ka- kaa kab kac kad kai kak kar kas kau kba kbb kbc kbd kbi kbk kbr kbs kbu kca kcb kcc kcd kci kck kcr kcs kcu kda kdb kdc kdk kdr kds kdu kia kib kic kid kii kik kir kis kiu kkb kkc kki kkk kkr kks kku kra krc krd kri krk krr krs kru ksa ksb ksc ksd ksi ksk ksr kss ksu kub kuc kud kui kuk kur kus kuu ra- raa rab rac rad rai rak rar ras rau rba rbb rbc rbd rbi rbk rbr rbs rbu rca rcb rcc rcd rci rcr rcs rcu rda rdb rdc rdd rdi rdr rds rdu ria rib ric rid rii rik rir ris rkb rkc rkk rks rku rra rrb rrc rrd rri rrk rrr rrs rru rsa rsb rsc rsd rsi rsk rsr rss rsu rua rub ruc rud rui ruk rur rus ruu saa sab sac sad sai sak sar sas sau sba sbb sbc sbd sbi sbk sbr sbs sbu sca scb scc scd sci sck scr scs scu sda sdb sdc sdd sdi sdk sdr sds sdu sia sib sic sid sii sik sir sis siu sk- ska skb skc skd ski skk skr sks sku sr- sra srb src srd sri srk srr srs ss- ssa ssb ssc ssd ssi ssk ssr sss ssu sua sub suc sud sui suk sur sus suu ua- uaa uab uac uad uai uak uar uas uau uba ubb ubc ubi ubk ubr ubs ubu uca ucb ucc ucd uci uck ucr ucs ucu uda udb udc udd udi udk udr uds udu uia uib uic uid uii uir uis uiu uka ukb ukc uki ukk ukr uku ur- ura urb urc urd uri urk urr urs uru usa usb usc usd usi usk usr uss usu uua uuc uur uus uuu