-al a-a a-b a-c aaa aab aac aad aae aak aal aap aas ab- aba abb abc abd abe abk abl abp abs ac- aca acb acc acd ace ack acl acp acs ad- ada adb adc add ade adk adl adp ads aea aeb aec aed aee aek ael aep aes aka akb akc akd ake akk akl akp aks al- ala alb alc ald ale alk all alp als ap- apa apb apc apd ape apk apl app aps as- asa asb asc asd ase ask asl asp ass b-p baa bab bac bad bae bak bal bap bas bba bbb bbc bbd bbe bbk bbl bbp bbs bca bcb bcc bcd bce bck bcl bcp bcs bda bdb bdc bdd bde bdk bdl bdp bds be- bea beb bec bed bee bek bel bep bes bka bkb bkc bke bkk bkl bkp bks bla blb blc bld ble blk bll blp bls bpa bpb bpc bpd bpe bpl bpp bps bsa bsb bsc bsd bse bsk bsl bsp bss c-- caa cab cac cad cae cak cal cap cas cba cbb cbc cbd cbe cbk cbl cbp cbs cca ccb ccc ccd cce cck ccl ccp ccs cda cdb cdc cdd cde cdk cdl cdp cds ce- cea ceb cec ced cee cek cel cep ces cka ckb ckc ckd cks cl- cla clb clc cld cle clk cll clp cls cpa cpb cpc cpd cpe cpk cpl cpp cps csa csb csc csd cse csk csl csp css daa dab dac dad dae dak dal dap das dba dbb dbc dbd dbe dbk dbl dbp dbs dca dcb dcc dcd dce dck dcl dcp dcs dda ddb ddc ddd dde ddk ddl ddp dds de- dea deb dec ded dee dek del dep des dka dkb dkc dke dkk dkl dkp dks dl- dla dlb dlc dld dle dlk dll dlp dls dpa dpb dpc dpd dpe dpk dpl dpp dps dsa dsb dsc dsd dse dsk dsl dsp dss eaa eab eac ead eae eak eal eap eas eba ebb ebc ebd ebe ebk ebl ebp ebs ec- eca ecb ecc ecd ece eck ecl ecs ed- eda edb edc edd ede edk edl edp eds eea eeb eec eed eee eek eel eep ees eka ekb ekc ekd eke ekl ekp eks ela elb elc eld ele elk ell elp els ep- epa epb epc epd epe epl epp eps es- esa esb esc esd ese esk esl esp ess ka- kaa kab kac kad kae kak kal kap kas kba kbb kbc kbd kbe kbk kbl kbp kbs kca kcb kcc kcd kce kck kcl kcp kcs kda kdb kdc kde kdk kdl kdp kds ke- kea keb kec ked kee kek kel kep kes kkb kkc kke kkk kkl kkp kks kl- kla klb klc kld kls kpa kpc kpd kpe kpk kpl kpp kps ksa ksb ksc ksd kse ksk ksl ksp kss l-p la- laa lab lac lad lae lak lal lap las lba lbb lbc lbd lbe lbk lbl lbp lbs lca lcb lcc lcd lce lck lcl lcp lcs lda ldb ldc ldd lde ldk ldl ldp lds lea leb lec led lee lek lel lep les lka lkb lkl lkp lks lla llb llc lld lle llk lll llp lls lpa lpb lpc lpd lpe lpk lpl lpp lps lsa lsb lsc lsd lse lsk lsl lsp lss p-p paa pab pac pad pae pak pal pap pas pba pbb pbc pbd pbe pbk pbl pbp pbs pca pcb pcc pcd pce pck pcl pcp pcs pda pdb pdc pdd pde pdk pdl pdp pds pea peb pec ped pee pek pel pep pes pka pkb pkc pkd pke pkl pkp pks pla plb plc pld ple plk pll plp pls ppa ppb ppc ppd ppe ppk ppl ppp pps ps- psa psb psc psd pse psk psl psp pss saa sab sac sad sae sak sal sap sas sba sbb sbc sbd sbe sbk sbl sbp sbs sca scb scc scd sce sck scl scp scs sda sdb sdc sdd sde sdk sdl sdp sds se- sea seb sec sed see sek sel sep ses sk- ska skb skc skd ske skk skl skp sks sla slb slc sld sle slk sll slp sls spa spb spc spd spe spk spl spp sps ss- ssa ssb ssc ssd sse ssk ssl ssp sss