-al a-a a-b a-c a-t aaa aab aac aae aal aam aat ab- aba abb abc abe abl abm abt ac- aca acb acc ace acl acm act aea aeb aec aee ael aem aet al- ala alb alc ale all alm alt ama amb amc ame aml amm amt at- ata atb atc ate atl atm att baa bab bac bae bal bam bat bba bbb bbc bbe bbl bbm bbt bca bcb bcc bce bcl bcm bct be- bea beb bec bee bel bem bet bla blb blc ble bll blm blt bma bmb bmc bme bml bmm bmt bta btb btc bte btl btm btt c-- caa cab cac cae cal cam cat cba cbb cbc cbe cbl cbm cbt cca ccb ccc cce ccl ccm cct ce- cea ceb cec cee cel cem cet cl- cla clb clc cle cll clm clt cma cmb cmc cme cml cmm cmt cta ctb ctc cte ctl ctm ctt eaa eab eac eae eal eam eat eba ebb ebc ebe ebl ebm ebt ec- eca ecb ecc ece ecl ecm ect eea eeb eec eee eel eem eet ela elb elc ele ell elm elt em- ema emb emc eme eml emm emt eta etb etc ete etl etm ett la- laa lab lac lae lal lam lat lba lbb lbc lbe lbl lbm lbt lca lcb lcc lce lcl lcm lct lea leb lec lee lel lem let lla llb llc lle lll llm llt lma lmb lmc lme lml lmm lmt lta ltb ltc lte ltl ltm ltt maa mab mac mae mal mam mat mba mbb mbc mbe mbl mbm mbt mc- mca mcb mcc mce mcl mcm mct mea meb mec mee mel mem met mla mlb mlc mle mll mlm mlt mma mmb mmc mme mml mmm mmt mta mtb mtc mte mtl mtm mtt taa tab tac tae tal tam tat tba tbb tbc tbe tbl tbm tbt tca tcb tcc tce tcl tcm tct te- tea teb tec tee tel tem tet tla tlc tle tll tlm tlt tma tmb tmc tme tml tmm tmt tta ttb ttc tte ttl ttm ttt