-al -ol a-a a-b a-c aaa aab aac aah aal aao aar aas ab- aba abb abc abh abl abo abr abs ac- aca acb acc ach acl aco acr acs aha ahb ahc ahh ahl aho ahr ahs al- ala alb alc alh all alo alr als aoa aob aoc aoh aol aoo aor aos ar- ara arb arc arh arl aro arr ars as- asa asb asc ash asl aso asr ass baa bab bac bah bal bao bar bas bba bbb bbc bbh bbl bbo bbr bbs bca bcb bcc bch bcl bco bcr bcs bha bhb bhc bhh bhl bho bhr bhs bla blb blc blh bll blo blr bls boa bob boc boh bol boo bor bos bra brb brh brl bro brr brs bsa bsb bsc bsh bsl bso bsr bss c-- caa cab cac cah cal cao car cas cba cbb cbc cbh cbl cbo cbr cbs cca ccb ccc cch ccl cco ccr ccs ch- cha chb chc chh chl cho chr chs cl- cla clb clc clh cll clo clr cls co- coa cob coc coh col coo cor cos cra crb crc crh crl cro crr crs csa csb csc csh csl cso csr css haa hab hac hah hal hao har has hba hbb hbc hbh hbl hbo hbr hbs hca hcb hcc hch hcl hco hcr hcs hha hhb hhc hhh hhl hho hhr hhs hla hlb hlc hlh hll hlo hlr hls hoa hob hoc hoh hol hoo hor hos hr- hra hrb hrc hrh hrl hro hrr hrs hsa hsb hsc hsh hsl hsr hss la- laa lab lac lah lal lao lar las lba lbb lbc lbh lbl lbo lbr lbs lca lcb lcc lch lcl lco lcr lcs lha lhb lhc lhh lho lhr lhs lla llb llc lll llo llr lls loa lob loc loh lol loo lor los lra lrb lrc lrh lro lrr lrs lsa lsb lsc lsh lsl lso lsr lss oaa oab oac oah oal oao oar oas ob- oba obb obc obh obl obo obr obs oc- oca ocb occ och ocl oco ocr ocs oha ohc ohh ohl oho ohr ohs ola olb olc oll olo ols oo- ooa oob ooc ooh ool ooo oor oos or- ora orb orc orh orl oro orr ors os- osa osb osc osh osl oso osr oss ra- raa rab rac rah ral rao rar ras rba rbb rbc rbh rbl rbo rbr rbs rca rcb rcc rch rcl rco rcr rcs rh- rha rhb rhc rhh rhl rho rhr rhs rla rlc rlh rll rlo rlr rls roa rob roc roh rol roo ror ros rra rrb rrc rrh rrl rrr rrs rsa rsb rsc rsh rsl rso rsr rss saa sab sac sah sal sao sar sas sba sbb sbc sbh sbl sbo sbr sbs sca scb scc sch scl sco scr scs sh- sha shb shc shh shl sho shr shs sla slb slc slh sll slo slr sls soa sob soc soh sol soo sor sos sr- sra srb src srh srl sro srr srs ss- ssa ssb ssc ssh ssl sso ssr sss