-al -ol a-a a-b a-c aaa aab aac aak aal aao aap aas ab- aba abb abc abk abl abo abp abs ac- aca acb acc ack acl aco acp acs aka akb akc akk akl ako akp aks al- ala alb alc alk all alo alp als aoa aob aoc aok aol aoo aop aos ap- apa apb apc apk apl apo app aps as- asa asb asc ask asl aso asp ass b-p baa bab bac bak bal bao bap bas bba bbb bbc bbk bbl bbo bbp bbs bca bcb bcc bck bcl bco bcp bcs bka bkb bkc bkk bkl bko bkp bks bla blb blc blk bll blo blp bls boa bob boc bok bol boo bop bos bpa bpb bpc bpl bpo bpp bps bsa bsb bsc bsk bsl bso bsp bss c-- caa cab cac cak cal cao cap cas cba cbb cbc cbk cbl cbo cbp cbs cca ccb ccc cck ccl cco ccp ccs cka ckb ckc cko cks cl- cla clb clc clk cll clo clp cls co- coa cob coc cok col coo cop cos cpa cpb cpc cpk cpl cpo cpp cps csa csb csc csk csl cso csp css ka- kaa kab kac kak kal kao kap kas kba kbb kbc kbk kbl kbo kbp kbs kca kcb kcc kck kcl kcp kcs kkb kkc kkk kkl kkp kks kl- kla klb klc klo kls koa kob koc kok kol koo kop kos kpa kpc kpk kpl kpo kpp kps ksa ksb ksc ksk ksl kso ksp kss l-p la- laa lab lac lak lal lao lap las lba lbb lbc lbk lbl lbo lbp lbs lca lcb lcc lck lcl lco lcp lcs lka lkb lkl lkp lks lla llb llc llk lll llo llp lls loa lob loc lok lol loo lop los lpa lpb lpc lpk lpl lpo lpp lps lsa lsb lsc lsk lsl lso lsp lss oaa oab oac oak oal oao oap oas ob- oba obb obc obk obl obo obp obs oc- oca ocb occ ock ocl oco ocp ocs oka okb okc okk okl oko okp oks ola olb olc olk oll olo olp ols oo- ooa oob ooc ook ool ooo oop oos op- opa opb opc opk opl opo opp ops os- osa osb osc osk osl oso osp oss p-p paa pab pac pak pal pao pap pas pba pbb pbc pbk pbl pbo pbp pbs pca pcb pcc pck pcl pco pcp pcs pka pkb pkc pkl pko pkp pks pla plb plc plk pll plo plp pls poa pob poc pok pol poo pop pos ppa ppb ppc ppk ppl ppo ppp pps ps- psa psb psc psk psl pso psp pss saa sab sac sak sal sao sap sas sba sbb sbc sbk sbl sbo sbp sbs sca scb scc sck scl sco scp scs sk- ska skb skc skk skl sko skp sks sla slb slc slk sll slo slp sls soa sob soc sok sol soo sop sos spa spb spc spk spl spo spp sps ss- ssa ssb ssc ssk ssl sso ssp sss