-al a-a a-b a-c a-t aaa aab aac aae aal aam aas aat ab- aba abb abc abe abl abm abs abt ac- aca acb acc ace acl acm acs act aea aeb aec aee ael aem aes aet al- ala alb alc ale all alm als alt ama amb amc ame aml amm ams amt as- asa asb asc ase asl asm ass ast at- ata atb atc ate atl atm ats att baa bab bac bae bal bam bas bat bba bbb bbc bbe bbl bbm bbs bbt bca bcb bcc bce bcl bcm bcs bct be- bea beb bec bee bel bem bes bet bla blb blc ble bll blm bls blt bma bmb bmc bme bml bmm bms bmt bsa bsb bsc bse bsl bsm bss bst bta btb btc bte btl btm bts btt c-- caa cab cac cae cal cam cas cat cba cbb cbc cbe cbl cbm cbs cbt cca ccb ccc cce ccl ccm ccs cct ce- cea ceb cec cee cel cem ces cet cl- cla clb clc cle cll clm cls clt cma cmb cmc cme cml cmm cms cmt csa csb csc cse csl csm css cst cta ctb ctc cte ctl ctm cts ctt eaa eab eac eae eal eam eas eat eba ebb ebc ebe ebl ebm ebs ebt ec- eca ecb ecc ece ecl ecm ecs ect eea eeb eec eee eel eem ees eet ela elb elc ele ell elm els elt em- ema emb emc eme eml emm ems emt es- esa esb esc ese esl esm ess est eta etb etc ete etl etm ets ett la- laa lab lac lae lal lam las lat lba lbb lbc lbe lbl lbm lbs lbt lca lcb lcc lce lcl lcm lcs lct lea leb lec lee lel lem les let lla llb llc lle lll llm lls llt lma lmb lmc lme lml lmm lms lmt lsa lsb lsc lse lsl lsm lss lst lta ltb ltc lte ltl ltm lts ltt maa mab mac mae mal mam mas mat mba mbb mbc mbe mbl mbm mbs mbt mc- mca mcb mcc mce mcl mcm mcs mct mea meb mec mee mel mem mes met mla mlb mlc mle mll mlm mls mlt mma mmb mmc mme mml mmm mms mmt msa msb msc mse msl msm mss mst mta mtb mtc mte mtl mtm mts mtt saa sab sac sae sal sam sas sat sba sbb sbc sbe sbl sbm sbs sbt sca scb scc sce scl scm scs sct se- sea seb sec see sel sem ses set sla slb slc sle sll slm sls slt sma smb smc sme sml smm sms smt ss- ssa ssb ssc sse ssl ssm sss sst sta stb stc ste stl stm sts stt taa tab tac tae tal tam tas tat tba tbb tbc tbe tbl tbm tbs tbt tca tcb tcc tce tcl tcm tcs tct te- tea teb tec tee tel tem tes tet tla tlc tle tll tlm tls tlt tma tmb tmc tme tml tmm tms tmt tsa tsb tsc tse tsl tsm tss tst tta ttb ttc tte ttl ttm tts ttt