a-a a-b a-i aaa aab aah aai aan aao aar aas ab- aba abb abh abi abn abo abr abs aha ahb ahh ahi ahn aho ahr ahs ai- aia aib aih aii ain aio air ais an- ana anb anh ani ann ano anr ans aoa aob aoh aoi aon aoo aor aos ar- ara arb arh ari arn aro arr ars as- asa asb ash asi asn aso asr ass baa bab bah bai ban bao bar bas bba bbb bbh bbi bbn bbo bbr bbs bha bhb bhh bhi bho bhr bhs bi- bia bib bih bii bin bio bir bis bna bnb bni bnn bno bnr bns boa bob boh boi bon boo bor bos bra brb brh bri brn bro brr brs bsa bsb bsh bsi bsn bso bsr bss h-i haa hab hah hai han hao har has hba hbb hbh hbi hbn hbo hbr hbs hha hhb hhh hhi hhn hho hhr hhs hia hib hih hii hin hio hir his hna hnb hnh hnn hno hns hoa hob hoh hoi hon hoo hor hos hr- hra hrb hrh hri hrn hro hrr hrs hsa hsb hsh hsi hsn hsr hss ia- iaa iab iah iai ian iao iar ias iba ibb ibh ibi ibn ibo ibr ibs iha ihb ihh ihi ihn iho ihr ihs iia iib iih iii iin iio iir iis in- ina inb inh ini inn ino inr ins io- ioa iob ioh ioi ion ioo ior ios ir- ira irb iri irn iro irr irs is- isa isb ish isi isn iso isr iss n-i naa nab nah nai nan nao nar nas nba nbb nbi nbn nbo nbr nbs nha nhb nhh nhi nhn nhr nhs nia nib nih nii nin nio nir nis nna nnb nnh nni nnn nno nns no- noa nob noh noi non noo nor nos nra nrb nri nrn nro nrr nrs nsa nsb nsh nsi nsn nso nsr nss o-i oaa oab oah oai oan oao oar oas ob- oba obb obh obi obn obo obr obs oha ohh ohi ohn oho ohr ohs oia oib oii oin oio oir ois on- ona onb onh oni onn ono onr ons oo- ooa oob ooh ooi oon ooo oor oos or- ora orb orh ori orn oro orr ors os- osa osb osh osi osn oso osr oss ra- raa rab rah rai ran rao rar ras rba rbb rbh rbi rbn rbo rbr rbs rh- rha rhb rhh rhi rhn rho rhr rhs ria rib rih rii rin rio rir ris rna rnb rnh rni rnn rno rnr rns roa rob roh roi ron roo ror ros rra rrb rrh rri rrn rrr rrs rsa rsb rsh rsi rsn rso rsr rss saa sab sah sai san sao sar sas sba sbb sbh sbi sbn sbo sbr sbs sh- sha shb shh shi shn sho shr shs sia sib sih sii sin sio sir sis sna snb sni snn sno snr sns soa sob soh soi son soo sor sos sr- sra srb srh sri srn sro srr srs ss- ssa ssb ssh ssi ssn sso ssr sss