-ic a-a a-b a-c a-i aaa aab aac aah aai aao aar aas aau ab- aba abb abc abh abi abo abr abs abu ac- aca acb acc ach aci aco acr acs acu aha ahb ahc ahh ahi aho ahr ahs ahu ai- aia aib aic aih aii aio air ais aiu aoa aob aoc aoh aoi aoo aor aos aou ar- ara arb arc arh ari aro arr ars aru as- asa asb asc ash asi aso asr ass asu au- aua aub auc auh aui auo aur aus b-u baa bab bac bah bai bao bar bas bau bba bbb bbc bbh bbi bbo bbr bbs bbu bca bcb bcc bch bci bco bcr bcs bcu bha bhb bhc bhh bhi bho bhr bhs bhu bi- bia bib bic bih bii bio bir bis biu boa bob boc boh boi boo bor bos bou bra brb brh bri bro brr brs bru bsa bsb bsc bsh bsi bso bsr bss bsu bua bub buc buh bui buo bur bus buu c-- caa cab cac cah cai cao car cas cau cba cbb cbc cbh cbi cbo cbr cbs cbu cca ccb ccc cch cci cco ccr ccs ccu ch- cha chb chc chh chi cho chr chs chu ci- cia cib cic cih cii cio cir cis ciu co- coa cob coc coh coi coo cor cos cou cra crb crc crh cri cro crr crs cru csa csb csc csh csi cso csr css csu cua cub cuc cuh cui cuo cur cus cuu h-i haa hab hac hah hai hao har has hau hba hbb hbc hbh hbi hbo hbr hbs hbu hca hcb hcc hch hci hco hcr hcs hha hhb hhc hhh hhi hho hhr hhs hhu hia hib hic hih hii hio hir his hiu hoa hob hoc hoh hoi hoo hor hos hou hr- hra hrb hrc hrh hri hro hrr hrs hru hsa hsb hsc hsh hsi hsr hss hsu hua hub huc huh hui huo hur hus huu ia- iaa iab iac iah iai iao iar ias iau iba ibb ibc ibh ibi ibo ibr ibs ibu ica icb icc ich ici ico icr ics icu iha ihb ihc ihh ihi iho ihr ihs ihu iia iib iic iih iii iio iir iis iiu io- ioa iob ioc ioh ioi ioo ior ios iou ir- ira irb irc iri iro irr irs iru is- isa isb isc ish isi iso isr iss isu iu- iua iub iuc iui iur ius o-i oaa oab oac oah oai oao oar oas oau ob- oba obb obc obh obi obo obr obs obu oc- oca ocb occ och oci oco ocr ocs ocu oha ohc ohh ohi oho ohr ohs ohu oia oib oic oii oio oir ois oiu oo- ooa oob ooc ooh ooi ooo oor oos or- ora orb orc orh ori oro orr ors oru os- osa osb osc osh osi oso osr oss osu ou- oua ouc ouh oui ouo our ous ra- raa rab rac rah rai rao rar ras rau rba rbb rbc rbh rbi rbo rbr rbs rbu rca rcb rcc rch rci rco rcr rcs rcu rh- rha rhb rhc rhh rhi rho rhr rhs rhu ria rib ric rih rii rio rir ris roa rob roc roh roi roo ror ros rou rra rrb rrc rrh rri rrr rrs rru rsa rsb rsc rsh rsi rso rsr rss rsu rua rub ruc ruh rui ruo rur rus ruu saa sab sac sah sai sao sar sas sau sba sbb sbc sbh sbi sbo sbr sbs sbu sca scb scc sch sci sco scr scs scu sh- sha shb shc shh shi sho shr shs shu sia sib sic sih sii sio sir sis siu soa sob soc soh soi soo sor sos sou sr- sra srb src srh sri sro srr srs ss- ssa ssb ssc ssh ssi sso ssr sss ssu sua sub suc suh sui suo sur sus suu ua- uaa uab uac uah uai uao uar uas uau uba ubb ubc ubh ubi ubo ubr ubs ubu uca ucb ucc uch uci uco ucr ucs ucu uha uhb uhc uhh uhi uho uhr uhs uhu uia uib uic uii uio uir uis uiu uoa uob uoc uoo uor uos ur- ura urb urc uri uro urr urs uru usa usb usc ush usi uso usr uss usu uua uuc uur uus uuu