-al a-a a-b a-c a-t aaa aab aac aal aam aat ab- aba abb abc abl abm abt ac- aca acb acc acl acm act al- ala alb alc all alm alt ama amb amc aml amm amt at- ata atb atc atl atm att baa bab bac bal bam bat bba bbb bbc bbl bbm bbt bca bcb bcc bcl bcm bct bla blb blc bll blm blt bma bmb bmc bml bmm bmt bta btb btc btl btm btt c-- caa cab cac cal cam cat cba cbb cbc cbl cbm cbt cca ccb ccc ccl ccm cct cl- cla clb clc cll clm clt cma cmb cmc cml cmm cmt cta ctb ctc ctl ctm ctt la- laa lab lac lal lam lat lba lbb lbc lbl lbm lbt lca lcb lcc lcl lcm lct lla llb llc lll llm llt lma lmb lmc lml lmm lmt lta ltb ltc ltl ltm ltt maa mab mac mal mam mat mba mbb mbc mbl mbm mbt mc- mca mcb mcc mcl mcm mct mla mlb mlc mll mlm mlt mma mmb mmc mml mmm mmt mta mtb mtc mtl mtm mtt taa tab tac tal tam tat tba tbb tbc tbl tbm tbt tca tcb tcc tcl tcm tct tla tlc tll tlm tlt tma tmb tmc tml tmm tmt tta ttb ttc ttl ttm ttt