-al a-a a-b a-c a-t aaa aab aac aae aak aal aam aas aat ab- aba abb abc abe abk abl abm abs abt ac- aca acb acc ace ack acl acm acs act aea aeb aec aee aek ael aem aes aet aka akb akc ake akk akl akm aks al- ala alb alc ale alk all alm als alt ama amb amc ame amk aml amm ams amt as- asa asb asc ase ask asl asm ass ast at- ata atb atc ate atl atm ats att baa bab bac bae bak bal bam bas bat bba bbb bbc bbe bbk bbl bbm bbs bbt bca bcb bcc bce bck bcl bcm bcs bct be- bea beb bec bee bek bel bem bes bet bka bkb bkc bke bkk bkl bkm bks bkt bla blb blc ble blk bll blm bls blt bma bmb bmc bme bmk bml bmm bms bmt bsa bsb bsc bse bsk bsl bsm bss bst bta btb btc bte btk btl btm bts btt c-- caa cab cac cae cak cal cam cas cat cba cbb cbc cbe cbk cbl cbm cbs cbt cca ccb ccc cce cck ccl ccm ccs cct ce- cea ceb cec cee cek cel cem ces cet cka ckb ckc ckm cks ckt cl- cla clb clc cle clk cll clm cls clt cma cmb cmc cme cmk cml cmm cms cmt csa csb csc cse csk csl csm css cst cta ctb ctc cte ctk ctl ctm cts ctt eaa eab eac eae eak eal eam eas eat eba ebb ebc ebe ebk ebl ebm ebs ebt ec- eca ecb ecc ece eck ecl ecm ecs ect eea eeb eec eee eek eel eem ees eet eka ekb ekc eke ekl eks ekt ela elb elc ele elk ell elm els elt em- ema emb emc eme emk eml emm ems emt es- esa esb esc ese esk esl esm ess est eta etb etc ete etk etl etm ets ett k-t ka- kaa kab kac kae kak kal kam kas kat kba kbb kbc kbe kbk kbl kbm kbs kca kcb kcc kce kck kcl kcm kcs kct ke- kea keb kec kee kek kel kem kes ket kkb kkc kke kkk kkl kkm kks kkt kl- kla klb klc klm kls klt kma kmb kmc kme kmk kml kmm kms kmt ksa ksb ksc kse ksk ksl ksm kss kst kta ktb ktc kte ktk ktl ktm kts ktt la- laa lab lac lae lak lal lam las lat lba lbb lbc lbe lbk lbl lbm lbs lbt lca lcb lcc lce lck lcl lcm lcs lct lea leb lec lee lek lel lem les let lka lkb lkl lks lkt lla llb llc lle llk lll llm lls llt lma lmb lmc lme lmk lml lmm lms lmt lsa lsb lsc lse lsk lsl lsm lss lst lta ltb ltc lte ltk ltl ltm lts ltt maa mab mac mae mak mal mam mas mat mba mbb mbc mbe mbk mbl mbm mbs mbt mc- mca mcb mcc mce mck mcl mcm mcs mct mea meb mec mee mek mel mem mes met mka mkb mkc mke mkk mkl mkm mks mkt mla mlb mlc mle mlk mll mlm mls mlt mma mmb mmc mme mmk mml mmm mms mmt msa msb msc mse msk msl msm mss mst mta mtb mtc mte mtk mtl mtm mts mtt saa sab sac sae sak sal sam sas sat sba sbb sbc sbe sbk sbl sbm sbs sbt sca scb scc sce sck scl scm scs sct se- sea seb sec see sek sel sem ses set sk- ska skb skc ske skk skl skm sks skt sla slb slc sle slk sll slm sls slt sma smb smc sme smk sml smm sms smt ss- ssa ssb ssc sse ssk ssl ssm sss sst sta stb stc ste stk stl stm sts stt taa tab tac tae tak tal tam tas tat tba tbb tbc tbe tbk tbl tbm tbs tbt tca tcb tcc tce tck tcl tcm tcs tct te- tea teb tec tee tek tel tem tes tet tka tkb tkc tke tkk tkl tkm tks tkt tla tlc tle tlk tll tlm tls tlt tma tmb tmc tme tmk tml tmm tms tmt tsa tsb tsc tse tsk tsl tsm tss tst tta ttb ttc tte ttk ttl ttm tts ttt