-al -ol a-a a-b a-c aaa aab aac aah aak aal aao aas ab- aba abb abc abh abk abl abo abs ac- aca acb acc ach ack acl aco acs aha ahb ahc ahh ahk ahl aho ahs aka akb akc akh akk akl ako aks al- ala alb alc alh alk all alo als aoa aob aoc aoh aok aol aoo aos as- asa asb asc ash ask asl aso ass baa bab bac bah bak bal bao bas bba bbb bbc bbh bbk bbl bbo bbs bca bcb bcc bch bck bcl bco bcs bha bhb bhc bhh bhk bhl bho bhs bka bkb bkc bkk bkl bko bks bla blb blc blh blk bll blo bls boa bob boc boh bok bol boo bos bsa bsb bsc bsh bsk bsl bso bss c-- caa cab cac cah cak cal cao cas cba cbb cbc cbh cbk cbl cbo cbs cca ccb ccc cch cck ccl cco ccs ch- cha chb chc chh chk chl cho chs cka ckb ckc ckh cko cks cl- cla clb clc clh clk cll clo cls co- coa cob coc coh cok col coo cos csa csb csc csh csk csl cso css haa hab hac hah hak hal hao has hba hbb hbc hbh hbk hbl hbo hbs hca hcb hcc hch hck hcl hco hcs hha hhb hhc hhh hhk hhl hho hhs hka hkb hkh hkk hkl hko hks hla hlb hlc hlh hll hlo hls hoa hob hoc hoh hok hol hoo hos hsa hsb hsc hsh hsk hsl hss ka- kaa kab kac kah kak kal kao kas kba kbb kbc kbh kbk kbl kbo kbs kca kcb kcc kch kck kcl kcs kha khh khk kho khs kkb kkc kkh kkk kkl kks kl- kla klb klc klh klo kls koa kob koc koh kok kol koo kos ksa ksb ksc ksh ksk ksl kso kss la- laa lab lac lah lak lal lao las lba lbb lbc lbh lbk lbl lbo lbs lca lcb lcc lch lck lcl lco lcs lha lhb lhc lhh lhk lho lhs lka lkb lkh lkl lks lla llb llc llk lll llo lls loa lob loc loh lok lol loo los lsa lsb lsc lsh lsk lsl lso lss oaa oab oac oah oak oal oao oas ob- oba obb obc obh obk obl obo obs oc- oca ocb occ och ock ocl oco ocs oha ohc ohh ohl oho ohs oka okb okc okk okl oko oks ola olb olc olk oll olo ols oo- ooa oob ooc ooh ook ool ooo oos os- osa osb osc osh osk osl oso oss saa sab sac sah sak sal sao sas sba sbb sbc sbh sbk sbl sbo sbs sca scb scc sch sck scl sco scs sh- sha shb shc shh shk shl sho shs sk- ska skb skc skh skk skl sko sks sla slb slc slh slk sll slo sls soa sob soc soh sok sol soo sos ss- ssa ssb ssc ssh ssk ssl sso sss