-al -ol a-a a-b a-i aaa aab aai aak aal aao aap aas ab- aba abb abi abk abl abo abp abs ai- aia aib aii aik ail aio aip ais aka akb aki akk akl ako akp aks al- ala alb ali alk all alo alp als aoa aob aoi aok aol aoo aop aos ap- apa apb api apk apl apo app aps as- asa asb asi ask asl aso asp ass b-p baa bab bai bak bal bao bap bas bba bbb bbi bbk bbl bbo bbp bbs bi- bia bib bii bik bil bio bip bis bka bkb bkk bkl bko bkp bks bla blb bli blk bll blo blp bls boa bob boi bok bol boo bop bos bpa bpb bpi bpl bpo bpp bps bsa bsb bsi bsk bsl bso bsp bss ia- iaa iab iai ial iao iap ias iba ibb ibi ibk ibl ibo ibp ibs iia iib iii iil iio iip iis ika ikb iki ikk ikl iko iks il- ila ilb ili ilk ill ilo ilp ils io- ioa iob ioi iol ioo iop ios ipa ipb ipi ipl ipo ipp ips is- isa isb isi isk isl iso isp iss ka- kaa kab kai kak kal kao kap kas kba kbb kbi kbk kbl kbo kbp kbs kia kib kii kik kil kio kip kis kkb kki kkk kkl kkp kks kl- kla klb kli klo kls koa kob koi kok kol koo kop kos kpa kpi kpk kpl kpo kpp kps ksa ksb ksi ksk ksl kso ksp kss l-p la- laa lab lai lak lal lao lap las lba lbb lbi lbk lbl lbo lbp lbs lia lib lii lik lil lio lip lis lka lkb lkl lkp lks lla llb lli llk lll llo llp lls loa lob loi lok lol loo lop los lpa lpb lpi lpk lpl lpo lpp lps lsa lsb lsi lsk lsl lso lsp lss o-i oaa oab oai oak oal oao oap oas ob- oba obb obi obk obl obo obp obs oia oib oii oik oil oio oip ois oka okb oki okk okl oko okp oks ola olb oli olk oll olo olp ols oo- ooa oob ooi ook ool ooo oop oos op- opa opb opi opk opl opo opp ops os- osa osb osi osk osl oso osp oss p-p paa pab pai pak pal pao pap pas pba pbb pbi pbk pbl pbo pbp pbs pia pib pii pik pil pio pip pis pka pkb pki pkl pko pkp pks pla plb pli plk pll plo plp pls poa pob poi pok pol poo pop pos ppa ppb ppi ppk ppl ppo ppp pps ps- psa psb psi psk psl pso psp pss saa sab sai sak sal sao sap sas sba sbb sbi sbk sbl sbo sbp sbs sia sib sii sik sil sio sip sis sk- ska skb ski skk skl sko skp sks sla slb sli slk sll slo slp sls soa sob soi sok sol soo sop sos spa spb spi spk spl spo spp sps ss- ssa ssb ssi ssk ssl sso ssp sss