a-a a-b aaa aab aah aan aao aar aas aav ab- aba abb abh abn abo abr abs abv aha ahb ahh ahn aho ahr ahs ahv an- ana anb anh ann ano anr ans anv aoa aob aoh aon aoo aor aos aov ar- ara arb arh arn aro arr ars arv as- asa asb ash asn aso asr ass asv av- ava avb avh avn avo avr avs baa bab bah ban bao bar bas bav bba bbb bbh bbn bbo bbr bbs bha bhb bhh bho bhr bhs bhv bna bnb bnn bno bnr bns bnv boa bob boh bon boo bor bos bov bra brb brh brn bro brr brs brv bsa bsb bsh bsn bso bsr bss bsv bva bvb bvh bvn bvo bvr bvs bvv haa hab hah han hao har has hav hba hbb hbh hbn hbo hbr hbs hbv hha hhb hhh hhn hho hhr hhs hhv hna hnb hnh hnn hno hns hnv hoa hob hoh hon hoo hor hos hov hr- hra hrb hrh hrn hro hrr hrs hrv hsa hsb hsh hsn hsr hss hsv hv- hva hvb hvn hvo hvr hvs hvv naa nab nah nan nao nar nas nav nba nbb nbn nbo nbr nbs nbv nha nhb nhh nhn nhr nhs nhv nna nnb nnh nnn nno nns nnv no- noa nob noh non noo nor nos nov nra nrb nrn nro nrr nrs nrv nsa nsb nsh nsn nso nsr nss nsv nva nvb nvh nvn nvv oaa oab oah oan oao oar oas oav ob- oba obb obh obn obo obr obs obv oha ohh ohn oho ohr ohs on- ona onb onh onn ono onr ons oo- ooa oob ooh oon ooo oor oos oov or- ora orb orh orn oro orr ors orv os- osa osb osh osn oso osr oss osv ov- ova ovb ovh ovo ovs ovv ra- raa rab rah ran rao rar ras rav rba rbb rbh rbn rbo rbr rbs rh- rha rhb rhh rhn rho rhr rhs rhv rna rnb rnh rnn rno rnr rns rnv roa rob roh ron roo ror ros rov rra rrb rrh rrn rrr rrs rsa rsb rsh rsn rso rsr rss rsv rva rvb rvh rvn rvo rvr rvs rvv saa sab sah san sao sar sas sav sba sbb sbh sbn sbo sbr sbs sbv sh- sha shb shh shn sho shr shs shv sna snb snn sno snr sns snv soa sob soh son soo sor sos sov sr- sra srb srh srn sro srr srs srv ss- ssa ssb ssh ssn sso ssr sss ssv sva svb svn svo svr svs svv v-a vaa vab vah van vao var vas vav vba vbh vbo vbr vbs vbv vh- vha vhb vho vhs vn- vna vno vnr vns vnv voa vob voh von voo vor vos vov vra vrb vrh vrn vrr vrs vsa vsb vsh vsn vso vsr vss vsv vva vvb vvo vvr vvs vvv