-al -ic -ol a-a a-b a-c a-i aaa aab aac aaf aai aak aal aao aas ab- aba abb abc abf abi abk abl abo abs ac- aca acb acc acf aci ack acl aco acs af- afa afb afc aff afi afk afl afo afs ai- aia aib aic aif aii aik ail aio ais aka akb akc aki akk akl ako aks al- ala alb alc alf ali alk all alo als aoa aob aoc aof aoi aok aol aoo aos as- asa asb asc asf asi ask asl aso ass baa bab bac baf bai bak bal bao bas bba bbb bbc bbf bbi bbk bbl bbo bbs bca bcb bcc bcf bci bck bcl bco bcs bfa bfb bfc bff bfi bfl bfo bfs bi- bia bib bic bif bii bik bil bio bis bka bkb bkc bkf bkk bkl bko bks bla blb blc blf bli blk bll blo bls boa bob boc bof boi bok bol boo bos bsa bsb bsc bsf bsi bsk bsl bso bss c-- caa cab cac caf cai cak cal cao cas cba cbb cbc cbf cbi cbk cbl cbo cbs cca ccb ccc ccf cci cck ccl cco ccs cfa cfb cfc cff cfi cfk cfl cfo cfs ci- cia cib cic cif cii cik cil cio cis cka ckb ckc cki cko cks cl- cla clb clc clf cli clk cll clo cls co- coa cob coc cof coi cok col coo cos csa csb csc csf csi csk csl cso css faa fab fac faf fai fak fal fao fas fba fbb fbc fbf fbi fbk fbl fbo fbs fca fcb fcc fcf fci fck fcl fco fcs ffa ffc fff ffi ffk ffl ffo ffs fia fib fic fif fii fik fil fis fka fkb fkc fkf fki fkk fkl fla flb flc flf fli fll flo fls foa fob foc fof foi fok fol foo fos fsa fsb fsc fsf fsi fsk fsl fso fss i-f ia- iaa iab iac iaf iai ial iao ias iba ibb ibc ibf ibi ibk ibl ibo ibs ica icb icc icf ici ick icl ico ics ifa ifb ifc iff ifi ifl ifo ifs iia iib iic iif iii iil iio iis ika ikb ikc ikf iki ikk ikl iko iks il- ila ilb ilc ilf ili ilk ill ilo ils io- ioa iob ioc iof ioi iol ioo ios is- isa isb isc isf isi isk isl iso iss ka- kaa kab kac kaf kai kak kal kao kas kba kbb kbc kbf kbi kbk kbl kbo kbs kca kcb kcc kci kck kcl kcs kfa kfc kff kfi kfo kfs kia kib kic kif kii kik kil kio kis kkb kkc kki kkk kkl kks kl- kla klb klc klf kli klo kls koa kob koc kof koi kok kol koo kos ksa ksb ksc ksf ksi ksk ksl kso kss la- laa lab lac laf lai lak lal lao las lba lbb lbc lbf lbi lbk lbl lbo lbs lca lcb lcc lcf lci lck lcl lco lcs lfa lfb lfc lff lfi lfk lfl lfo lfs lia lib lic lif lii lik lil lio lis lka lkb lkl lks lla llb llc llf lli llk lll llo lls loa lob loc lof loi lok lol loo los lsa lsb lsc lsf lsi lsk lsl lso lss o-i oaa oab oac oaf oai oak oal oao oas ob- oba obb obc obf obi obk obl obo obs oc- oca ocb occ ocf oci ock ocl oco ocs of- ofa ofb ofc off ofi ofl ofo ofs oia oib oic oif oii oik oil oio ois oka okb okc oki okk okl oko oks ola olb olc olf oli olk oll olo ols oo- ooa oob ooc oof ooi ook ool ooo oos os- osa osb osc osf osi osk osl oso oss saa sab sac saf sai sak sal sao sas sba sbb sbc sbf sbi sbk sbl sbo sbs sca scb scc scf sci sck scl sco scs sfa sfb sfc sff sfi sfk sfl sfo sfs sia sib sic sif sii sik sil sio sis sk- ska skb skc skf ski skk skl sko sks sla slb slc slf sli slk sll slo sls soa sob soc sof soi sok sol soo sos ss- ssa ssb ssc ssf ssi ssk ssl sso sss