-al a-a a-b a-c aaa aab aac aad aae aag aak aal aas ab- aba abb abc abd abe abg abk abl abs ac- aca acb acc acd ace acg ack acl acs ad- ada adb adc add ade adg adk adl ads aea aeb aec aed aee aeg aek ael aes ag- aga agb agc agd age agg agk agl ags aka akb akc akd ake akg akk akl aks al- ala alb alc ald ale alg alk all als as- asa asb asc asd ase asg ask asl ass baa bab bac bad bae bag bak bal bas bba bbb bbc bbd bbe bbg bbk bbl bbs bca bcb bcc bcd bce bcg bck bcl bcs bda bdb bdc bdd bde bdg bdk bdl bds be- bea beb bec bed bee beg bek bel bes bga bgb bgc bgd bge bgg bgk bgl bgs bka bkb bkc bke bkg bkk bkl bks bla blb blc bld ble blg blk bll bls bsa bsb bsc bsd bse bsg bsk bsl bss c-- caa cab cac cad cae cag cak cal cas cba cbb cbc cbd cbe cbg cbk cbl cbs cca ccb ccc ccd cce ccg cck ccl ccs cda cdb cdc cdd cde cdg cdk cdl cds ce- cea ceb cec ced cee ceg cek cel ces cga cgb cgc cgd cge cgg cgl cgs cka ckb ckc ckd cks cl- cla clb clc cld cle clg clk cll cls csa csb csc csd cse csg csk csl css daa dab dac dad dae dag dak dal das dba dbb dbc dbd dbe dbg dbk dbl dbs dca dcb dcc dcd dce dcg dck dcl dcs dda ddb ddc ddd dde ddg ddk ddl dds de- dea deb dec ded dee deg dek del des dga dgc dgd dge dgg dgk dgl dgs dka dkb dkc dke dkg dkk dkl dks dl- dla dlb dlc dld dle dlg dlk dll dls dsa dsb dsc dsd dse dsg dsk dsl dss eaa eab eac ead eae eag eak eal eas eba ebb ebc ebd ebe ebg ebk ebl ebs ec- eca ecb ecc ecd ece ecg eck ecl ecs ed- eda edb edc edd ede edg edk edl eds eea eeb eec eed eee eeg eek eel ees ega egb egc egd ege egg egl egs eka ekb ekc ekd eke ekg ekl eks ela elb elc eld ele elg elk ell els es- esa esb esc esd ese esg esk esl ess g-d gaa gab gac gad gae gag gak gal gas gba gbc gbd gbe gbg gbk gbl gbs gca gcb gcc gcd gce gcg gck gcl gcs gda gdb gdc gdd gde gdk gdl gds ge- gea geb gec ged gee geg gek gel ges gga ggb ggc ggd ggg ggs gka gkb gkd gks gla glb glc gld gle glg glk gll gls gsa gsb gsc gsd gse gsg gsk gsl gss ka- kaa kab kac kad kae kag kak kal kas kba kbb kbc kbd kbe kbk kbl kbs kca kcb kcc kcd kce kcg kck kcl kcs kda kdb kdc kde kdg kdk kdl kds ke- kea keb kec ked kee keg kek kel kes kga kgb kgc kgd kgl kgs kkb kkc kke kkk kkl kks kl- kla klb klc kld klg kls ksa ksb ksc ksd kse ksg ksk ksl kss la- laa lab lac lad lae lag lak lal las lba lbb lbc lbd lbe lbg lbk lbl lbs lca lcb lcc lcd lce lcg lck lcl lcs lda ldb ldc ldd lde ldg ldk ldl lds lea leb lec led lee leg lek lel les lga lgb lgc lgd lge lgg lgk lgl lgs lka lkb lkg lkl lks lla llb llc lld lle llg llk lll lls lsa lsb lsc lsd lse lsg lsk lsl lss saa sab sac sad sae sag sak sal sas sba sbb sbc sbd sbe sbg sbk sbl sbs sca scb scc scd sce scg sck scl scs sda sdb sdc sdd sde sdg sdk sdl sds se- sea seb sec sed see seg sek sel ses sga sgb sgc sgd sge sgg sgk sgl sgs sk- ska skb skc skd ske skg skk skl sks sla slb slc sld sle slg slk sll sls ss- ssa ssb ssc ssd sse ssg ssk ssl sss